Merge pull request #54174 from thockin/gcr-vanity

Automatic merge from submit-queue (batch tested with PRs 54379, 56593, 56685, 54174, 57309). 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>.

Use k8s.gcr.io vanity domain for container images

Related issue: kubernetes/release#281

```release-note
Use "k8s.gcr.io" for container images rather than "gcr.io/google_containers".  This is just a redirect, for now, so should not impact anyone materially.

Documentation and tools should all convert to the new name. Users should take note of this in case they see this new name in the system.
```

Kubernetes-commit: e5abffca6f91d42fb5ae97b28fa6683e4244c12b

core/v1/types.go

@@ -3906,7 +3906,7 @@ type PodSignature struct {
 // Describe a container image
 type ContainerImage struct {
 	// Names by which this image is known.
-	// e.g. ["gcr.io/google_containers/hyperkube:v1.0.7", "dockerhub.io/google_containers/hyperkube:v1.0.7"]
+	// e.g. ["k8s.gcr.io/hyperkube:v1.0.7", "dockerhub.io/google_containers/hyperkube:v1.0.7"]
 	Names []string `json:"names" protobuf:"bytes,1,rep,name=names"`
 	// The size of the image in bytes.
 	// +optional

core/v1/types_swagger_doc_generated.go

@@ -308,7 +308,7 @@ func (Container) SwaggerDoc() map[string]string {
 
 var map_ContainerImage = map[string]string{
 	"":          "Describe a container image",
-	"names":     "Names by which this image is known. e.g. [\"gcr.io/google_containers/hyperkube:v1.0.7\", \"dockerhub.io/google_containers/hyperkube:v1.0.7\"]",
+	"names":     "Names by which this image is known. e.g. [\"k8s.gcr.io/hyperkube:v1.0.7\", \"dockerhub.io/google_containers/hyperkube:v1.0.7\"]",
 	"sizeBytes": "The size of the image in bytes.",
 }