Bump go.etcd.io/etcd/v3 from 3.5.2 to 3.5.4 (#913)

* Bump go.etcd.io/etcd/v3 from 3.5.2 to 3.5.4

Bumps [go.etcd.io/etcd/v3](https://github.com/etcd-io/etcd) from 3.5.2 to 3.5.4.
- [Release notes](https://github.com/etcd-io/etcd/releases)
- [Changelog](https://github.com/etcd-io/etcd/blob/main/Dockerfile-release.amd64)
- [Commits](etcd-io/etcd@v3.5.2...v3.5.4)

---
updated-dependencies:
- dependency-name: go.etcd.io/etcd/v3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Updated other etcd libs and downgrading opentelemetry

It's easier to update all etcd libs at the same time

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Martin Hutchinson <mhutchinson@gmail.com>

go.mod

@@ -3,30 +3,44 @@ module github.com/google/certificate-transparency-go
 go 1.16
 
 require (
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/form3tech-oss/jwt-go v3.2.5+incompatible // indirect
 	github.com/fullstorydev/grpcurl v1.8.5
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/golang/mock v1.6.0
 	github.com/golang/protobuf v1.5.2
 	github.com/google/go-cmp v0.5.7
 	github.com/google/trillian v1.4.0
 	github.com/gorilla/mux v1.8.0
+	github.com/jonboulle/clockwork v0.3.0 // indirect
 	github.com/juju/ratelimit v1.0.1
 	github.com/kylelemons/godebug v1.1.0
+	github.com/mattn/go-runewidth v0.0.13 // indirect
 	github.com/mattn/go-sqlite3 v1.14.10
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
-	github.com/prometheus/client_golang v1.11.0
+	github.com/prometheus/client_golang v1.12.1
+	github.com/prometheus/common v0.34.0 // indirect
 	github.com/rs/cors v1.8.2
 	github.com/sergi/go-diff v1.2.0
 	github.com/spf13/cobra v1.4.0
 	github.com/spf13/pflag v1.0.5
+	github.com/stretchr/testify v1.7.1 // indirect
 	github.com/tomasen/realip v0.0.0-20180522021738-f0c99a92ddce
 	github.com/transparency-dev/merkle v0.0.0-20220411132142-cfdaeb1822ee
-	go.etcd.io/etcd/client/v3 v3.5.2
-	go.etcd.io/etcd/etcdctl/v3 v3.5.2
-	go.etcd.io/etcd/v3 v3.5.2
-	golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0
-	golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420
+	github.com/urfave/cli v1.22.7 // indirect
+	go.etcd.io/etcd/client/v3 v3.5.4
+	go.etcd.io/etcd/etcdctl/v3 v3.5.4
+	go.etcd.io/etcd/v3 v3.5.4
+	go.opentelemetry.io/contrib v1.6.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.8.0 // indirect
+	go.uber.org/zap v1.21.0 // indirect
+	golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4
+	golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4
+	golang.org/x/sys v0.0.0-20220422013727-9388b58f7150 // indirect
+	golang.org/x/time v0.0.0-20220411224347-583f2d630306 // indirect
+	google.golang.org/genproto v0.0.0-20220426171045-31bebdecfb46 // indirect
 	google.golang.org/grpc v1.46.0
-	google.golang.org/protobuf v1.27.1
+	google.golang.org/protobuf v1.28.0
 	gopkg.in/yaml.v2 v2.4.0
 )