[pull] main from kserve:main (#298)

* docs: changed every instance of default_bucket to bucket (kserve#507)

#### Motivation

Replacing default_bucket -> bucket everywhere in this repo to ensure
it's consistent with KServe.

#### Modifications

replaced every instance of `default_bucket` to `bucket`

#### Result

Tested the [quickstart
install](https://github.com/kserve/modelmesh-serving/blob/main/docs/quickstart.md)
after modifying
[quickstart.yaml](https://github.com/kserve/modelmesh-serving/blob/6c86da9473d50de63f9ea3af8a4d7c223849547e/config/dependencies/quickstart.yaml#L127)

pods up and running - 

```
kubectl get pods
NAME                                              READY   STATUS    RESTARTS   AGE
etcd-6fdc487479-m9pkx                             1/1     Running   0          32m
minio-6b5c846587-8bwdv                            1/1     Running   0          32m
modelmesh-controller-5cd8d68bc-9ls9p              1/1     Running   0          31m
modelmesh-serving-mlserver-1.x-66bb94dcf6-hvgzj   4/4     Running   0          26m
modelmesh-serving-mlserver-1.x-66bb94dcf6-qtdzw   4/4     Running   0          26m
```

Model deployed and InferenceService is Ready - 

```
kubectl get isvc
NAME                   URL                                               READY   PREV   LATEST   PREVROLLEDOUTREVISION   LATESTREADYREVISION   AGE
example-sklearn-isvc   grpc://modelmesh-serving.modelmesh-serving:8033   True  
```

```
kubectl describe isvc example-sklearn-isvc
Name:         example-sklearn-isvc
Namespace:    modelmesh-serving
Labels:       <none>
Annotations:  serving.kserve.io/deploymentMode: ModelMesh
API Version:  serving.kserve.io/v1beta1
Kind:         InferenceService
Metadata:
  Creation Timestamp:  2024-05-28T07:19:00Z
  Generation:          1
  Resource Version:    5950
  UID:                 db71cf11-7842-4bc1-af97-647282e6b9b9
Spec:
  Predictor:
    Model:
      Model Format:
        Name:  sklearn
      Storage:
        Key:   localMinIO
        Path:  sklearn/mnist-svm.joblib
Status:
  Components:
    Predictor:
      Grpc URL:  grpc://modelmesh-serving.modelmesh-serving:8033
      Rest URL:  http://modelmesh-serving.modelmesh-serving:8008
      URL:       grpc://modelmesh-serving.modelmesh-serving:8033
  Conditions:
    Last Transition Time:  2024-05-28T07:25:07Z
    Status:                True
    Type:                  PredictorReady
    Last Transition Time:  2024-05-28T07:25:07Z
    Status:                True
    Type:                  Ready
  Model Status:
    Copies:
      Failed Copies:  0
      Total Copies:   1
    States:
      Active Model State:  Loaded
      Target Model State:  
    Transition Status:     UpToDate
  URL:                     grpc://modelmesh-serving.modelmesh-serving:8033
Events:                    <none>
```

Inference Request successful - 

```
MODEL_NAME=example-sklearn-isvc
grpcurl \
  -plaintext \
  -proto fvt/proto/kfs_inference_v2.proto \
  -d '{ "model_name": "'"${MODEL_NAME}"'", "inputs": [{ "name": "predict", "shape": [1, 64], "datatype": "FP32", "contents": { "fp32_contents": [0.0, 0.0, 1.0, 11.0, 14.0, 15.0, 3.0, 0.0, 0.0, 1.0, 13.0, 16.0, 12.0, 16.0, 8.0, 0.0, 0.0, 8.0, 16.0, 4.0, 6.0, 16.0, 5.0, 0.0, 0.0, 5.0, 15.0, 11.0, 13.0, 14.0, 0.0, 0.0, 0.0, 0.0, 2.0, 12.0, 16.0, 13.0, 0.0, 0.0, 0.0, 0.0, 0.0, 13.0, 16.0, 16.0, 6.0, 0.0, 0.0, 0.0, 0.0, 16.0, 16.0, 16.0, 7.0, 0.0, 0.0, 0.0, 0.0, 11.0, 13.0, 12.0, 1.0, 0.0] }}]}' \
  localhost:8033 \
  inference.GRPCInferenceService.ModelInfer

Handling connection for 8033
{
  "modelName": "example-sklearn-isvc__isvc-6b2eb0b8bf",
  "outputs": [
    {
      "name": "predict",
      "datatype": "INT64",
      "shape": [
        "1",
        "1"
      ],
      "contents": {
        "int64Contents": [
          "8"
        ]
      }
    }
  ]
}
```


This issue closes kserve#456

---------

Signed-off-by: Aayush Subramaniam <aayushsubramaniam@gmail.com>

* ci: Add nightly build twice a week (kserve#513)

Signed-off-by: Christian Kadner <ckadner@us.ibm.com>

* chore: Use ubi8/go-toolset:1.21 for dev image (kserve#515)

Signed-off-by: Spolti <fspolti@redhat.com>

---------

Signed-off-by: Aayush Subramaniam <aayushsubramaniam@gmail.com>
Signed-off-by: Christian Kadner <ckadner@us.ibm.com>
Signed-off-by: Spolti <fspolti@redhat.com>
Co-authored-by: Aayush Subramaniam <51130346+aayushsss1@users.noreply.github.com>
Co-authored-by: Christian Kadner <ckadner@us.ibm.com>
Co-authored-by: Filippe Spolti <fspolti@redhat.com>