Merge pull request #31617 from jsafrane/default-storage-class

Automatic merge from submit-queue

Deploy a default StorageClass instance on AWS and GCE

This needs a newer kubectl in kube-addons-manager container. It's quite tricky to test as I cannot push new container image to gcr.io and I must copy the newer container manually.

cc @kubernetes/sig-storage

**Release note**:
```release-note
Kubernetes now installs a default StorageClass object when deployed on AWS, GCE and
OpenStack with kube-up.sh scripts. This StorageClass will automatically provision
a PeristentVolume in corresponding cloud for a PersistentVolumeClaim that cannot be
satisfied by any existing matching PersistentVolume in Kubernetes.

To override this default provisioning, administrators must manually delete this default StorageClass.
```

cluster/common.sh

@@ -637,6 +637,7 @@ KUBE_ADDON_REGISTRY: $(yaml-quote ${KUBE_ADDON_REGISTRY:-})
 MULTIZONE: $(yaml-quote ${MULTIZONE:-})
 NON_MASQUERADE_CIDR: $(yaml-quote ${NON_MASQUERADE_CIDR:-})
 KUBE_UID: $(yaml-quote ${KUBE_UID:-})
+ENABLE_DEFAULT_STORAGE_CLASS: $(yaml-quote ${ENABLE_DEFAULT_STORAGE_CLASS:-})
 EOF
   if [ -n "${KUBELET_PORT:-}" ]; then
     cat >>$file <<EOF