Merge pull request #35491 from pmorie/byebye-getrootcontext

Automatic merge from submit-queue

Remove GetRootContext method from VolumeHost interface

Remove the `GetRootContext` call from the `VolumeHost` interface, since Kubernetes no longer needs to know the SELinux context of the Kubelet directory.

Per #33951 and #35127.

Depends on #33663; only the last commit is relevant to this PR.

test/integration/persistentvolumes/persistent_volumes_test.go

@@ -1110,7 +1110,7 @@ func createClients(ns *api.Namespace, t *testing.T, s *httptest.Server, syncPeri
 		Burst:         1000000,
 	})
 
-	host := volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil, "" /* rootContext */)
+	host := volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil)
 	plugin := &volumetest.FakeVolumePlugin{
 		PluginName:             provisionerPluginName,
 		Host:                   host,