Merge pull request kubernetes#67349 from mikedanese/trbeta

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions here: https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md.

promote TokenRequest and projection to beta in 1.12

```release-note
TokenRequest and TokenRequestProjection are now beta features. To enable these feature, the API server needs to be started with the following flags:
* --service-account-issuer
* --service-account-signing-key-file
* --service-account-api-audiences
```

Author: Kubernetes Submit Queue

pkg/features/kube_features.go

@@ -255,13 +255,13 @@ const (
 	ScheduleDaemonSetPods utilfeature.Feature = "ScheduleDaemonSetPods"
 
 	// owner: @mikedanese
-	// alpha: v1.10
+	// beta: v1.12
 	//
 	// Implement TokenRequest endpoint on service account resources.
 	TokenRequest utilfeature.Feature = "TokenRequest"
 
 	// owner: @mikedanese
-	// alpha: v1.11
+	// beta: v1.12
 	//
 	// Enable ServiceAccountTokenVolumeProjection support in ProjectedVolumes.
 	TokenRequestProjection utilfeature.Feature = "TokenRequestProjection"
@@ -408,8 +408,8 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
 	SupportPodPidsLimit:                         {Default: false, PreRelease: utilfeature.Alpha},
 	HyperVContainer:                             {Default: false, PreRelease: utilfeature.Alpha},
 	ScheduleDaemonSetPods:                       {Default: false, PreRelease: utilfeature.Alpha},
-	TokenRequest:                                {Default: false, PreRelease: utilfeature.Alpha},
-	TokenRequestProjection:                      {Default: false, PreRelease: utilfeature.Alpha},
+	TokenRequest:                                {Default: true, PreRelease: utilfeature.Beta},
+	TokenRequestProjection:                      {Default: true, PreRelease: utilfeature.Beta},
 	CRIContainerLogRotation:                     {Default: true, PreRelease: utilfeature.Beta},
 	GCERegionalPersistentDisk:                   {Default: true, PreRelease: utilfeature.Beta},
 	RunAsGroup:                                  {Default: false, PreRelease: utilfeature.Alpha},

plugin/pkg/auth/authorizer/rbac/bootstrappolicy/testdata/cluster-roles.yaml

@@ -950,6 +950,12 @@ items:
     - get
     - patch
     - update
+  - apiGroups:
+    - ""
+    resources:
+    - serviceaccounts/token
+    verbs:
+    - create
   - apiGroups:
     - storage.k8s.io
     resources: