Replace stub request with real (non-authed) dockerhub request.

[absoludity]

Description of the change

Adds implementation of send_repositories for the dockerhub implementation, replacing the stub.

Benefits

Actual results (see below).

Applicable issues

• ref Implementation of OCI-Catalog gRPC micro-service #6263

Additional information

Logs for request show two separate requests to hub.docker:

RUST_LOG=debug cargo run
    Finished dev [unoptimized + debuginfo] target(s) in 0.52s
     Running `target/debug/oci-catalog`
[2023-06-13T01:54:29Z INFO  oci_catalog] listening for gRPC requests at 0.0.0.0:50001
[2023-06-13T01:54:33Z DEBUG oci_catalog::providers::dockerhub] requesting: https://hub.docker.com/v2/namespaces/bitnamicharts/repositories/?page_size=100&ordering=name&content_types=helm
[2023-06-13T01:54:33Z DEBUG reqwest::connect] starting new connection: https://hub.docker.com/
[2023-06-13T01:54:35Z DEBUG oci_catalog::providers::dockerhub] requesting: https://hub.docker.com/v2/namespaces/bitnamicharts/repositories/?content_types=helm&ordering=name&page=2&page_size=100

Request shows grpc streaming the full result.

grpcurl -proto ./proto/ocicatalog.proto -d '{"registry": "registry-1.docker.io", "namespace": "bitnamicharts", "content_types":["helm"]}' -plaintext "0.0.0.0:50001" ocicatalog.OCICatalog.ListRepositoriesForRegistry
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "airflow"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "apache"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "apisix"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "appsmith"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "argo-cd"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "argo-workflows"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "aspnet-core"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "cassandra"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "cert-manager"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "clickhouse"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "common"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "concourse"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "consul"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "contour"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "contour-operator"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "discourse"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "dokuwiki"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "drupal"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "ejbca"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "elasticsearch"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "etcd"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "external-dns"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "flink"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "fluent-bit"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "fluentd"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "flux"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "ghost"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "gitea"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "grafana"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "grafana-loki"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "grafana-mimir"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "grafana-operator"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "grafana-tempo"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "haproxy"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "harbor"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "influxdb"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "jaeger"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "jasperreports"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "jenkins"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "joomla"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "jupyterhub"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "kafka"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "keycloak"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "kiam"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "kibana"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "kong"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "kubeapps"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "kube-prometheus"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "kubernetes-event-exporter"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "kube-state-metrics"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "logstash"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "magento"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "mariadb"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "mariadb-galera"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "mastodon"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "matomo"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "mediawiki"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "memcached"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "metallb"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "metrics-server"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "minio"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "mongodb"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "mongodb-sharded"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "moodle"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "multus-cni"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "mxnet"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "mysql"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "nats"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "nginx"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "nginx-ingress-controller"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "node-exporter"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "oauth2-proxy"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "odoo"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "opencart"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "osclass"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "parse"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "phpbb"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "phpmyadmin"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "pinniped"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "postgresql"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "postgresql-ha"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "prestashop"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "prometheus"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "pytorch"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "rabbitmq"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "rabbitmq-cluster-operator"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "redis"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "redis-cluster"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "redmine"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "schema-registry"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "sealed-secrets"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "solr"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "sonarqube"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "spark"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "spring-cloud-dataflow"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "suitecrm"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "supabase"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "tensorflow-resnet"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "thanos"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "tomcat"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "vault"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "wavefront"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "wavefront-hpa-adapter"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "wavefront-prometheus-storage-adapter"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "whereabouts"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "wildfly"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "wordpress"
}
{
  "registry": "registry-1.docker.io",
  "namespace": "bitnamicharts",
  "name": "zookeeper"
}

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