Merge pull request kubernetes#53795 from xiangpengzhao/deprecate-eqr

Automatic merge from submit-queue (batch tested with PRs 53119, 53753, 53795, 52981). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Mark etcd-quorum-read as deprecated.

**What this PR does / why we need it**:

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
ref: kubernetes#53662 #kubernetes#53717

**Special notes for your reviewer**:
/cc @liggitt @dims @anguslees 

**Release note**:

```release-note
Deprecation: The flag `etcd-quorum-read ` of kube-apiserver is deprecated and the ability to switch off quorum read will be removed in a future release.
```

staging/src/k8s.io/apiserver/pkg/server/options/etcd.go

@@ -144,7 +144,8 @@ func (s *EtcdOptions) AddFlags(fs *pflag.FlagSet) {
 		"SSL Certificate Authority file used to secure etcd communication.")
 
 	fs.BoolVar(&s.StorageConfig.Quorum, "etcd-quorum-read", s.StorageConfig.Quorum,
-		"If true, enable quorum read.")
+		"If true, enable quorum read. It defaults to true and is strongly recommended not setting to false.")
+	fs.MarkDeprecated("etcd-quorum-read", "This flag is deprecated and the ability to switch off quorum read will be removed in a future release.")
 
 	fs.StringVar(&s.EncryptionProviderConfigFilepath, "experimental-encryption-provider-config", s.EncryptionProviderConfigFilepath,
 		"The file containing configuration for encryption providers to be used for storing secrets in etcd")