Merge pull request #51372 from mtaufen/feature-gate-file

Automatic merge from submit-queue (batch tested with PRs 49971, 51357, 51616, 51649, 51372)

Separate feature gates for dynamic kubelet config vs loading from a file

This makes it so these two features can be turned on independently, rather than bundling both under dynamic kubelet config.

fixes: #51664

```release-note
NONE
```

pkg/features/kube_features.go

@@ -45,6 +45,10 @@ const (
 	// alpha: v1.4
 	DynamicKubeletConfig utilfeature.Feature = "DynamicKubeletConfig"
 
+	// owner: @mtaufen
+	// alpha: v1.8
+	KubeletConfigFile utilfeature.Feature = "KubeletConfigFile"
+
 	// owner: @pweil-
 	// alpha: v1.5
 	//
@@ -152,6 +156,7 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
 	ExternalTrafficLocalOnly:                    {Default: true, PreRelease: utilfeature.GA},
 	AppArmor:                                    {Default: true, PreRelease: utilfeature.Beta},
 	DynamicKubeletConfig:                        {Default: false, PreRelease: utilfeature.Alpha},
+	KubeletConfigFile:                           {Default: false, PreRelease: utilfeature.Alpha},
 	DynamicVolumeProvisioning:                   {Default: true, PreRelease: utilfeature.Alpha},
 	ExperimentalHostUserNamespaceDefaultingGate: {Default: false, PreRelease: utilfeature.Beta},
 	ExperimentalCriticalPodAnnotation:           {Default: false, PreRelease: utilfeature.Alpha},