Merge pull request #44090 from NickrenREN/remove-alpha-pv

Automatic merge from submit-queue

Remove alphaProvisioner in PVController and AlphaStorageClassAnnotation

remove alpha annotation and alphaProvisioner 

**Release note**:

```release-note
NONE
```

cmd/kube-controller-manager/app/controllermanager.go

@@ -530,14 +530,9 @@ func StartControllers(controllers map[string]InitFunc, s *options.CMServer, root
 	}
 
 	if ctx.IsControllerEnabled(pvBinderControllerName) {
-		alphaProvisioner, err := NewAlphaVolumeProvisioner(cloud, s.VolumeConfiguration)
-		if err != nil {
-			return fmt.Errorf("an backward-compatible provisioner could not be created: %v, but one was expected. Provisioning will not work. This functionality is considered an early Alpha version.", err)
-		}
 		params := persistentvolumecontroller.ControllerParameters{
 			KubeClient:                clientBuilder.ClientOrDie("persistent-volume-binder"),
 			SyncPeriod:                s.PVClaimBinderSyncPeriod.Duration,
-			AlphaProvisioner:          alphaProvisioner,
 			VolumePlugins:             ProbeControllerVolumePlugins(cloud, s.VolumeConfiguration),
 			Cloud:                     cloud,
 			ClusterName:               s.ClusterName,