Merge pull request #37505 from k82cn/use_controller_inf

Automatic merge from submit-queue (batch tested with PRs 39807, 37505, 39844, 39525, 39109)

Made cache.Controller to be interface.

**What this PR does / why we need it**:

#37504

test/e2e/daemon_restart.go

@@ -192,7 +192,7 @@ var _ = framework.KubeDescribe("DaemonRestart [Disruptive]", func() {
 	existingPods := cache.NewStore(cache.MetaNamespaceKeyFunc)
 	var ns string
 	var config testutils.RCConfig
-	var controller *cache.Controller
+	var controller cache.Controller
 	var newPods cache.Store
 	var stopCh chan struct{}
 	var tracker *podTracker

test/e2e/network_partition.go

@@ -188,7 +188,7 @@ var _ = framework.KubeDescribe("Network Partition [Disruptive] [Slow]", func() {
 				nodeSelector := fields.OneTermEqualSelector("metadata.name", node.Name)
 				stopCh := make(chan struct{})
 				newNode := make(chan *v1.Node)
-				var controller *cache.Controller
+				var controller cache.Controller
 				_, controller = cache.NewInformer(
 					&cache.ListWatch{
 						ListFunc: func(options v1.ListOptions) (runtime.Object, error) {

test/e2e_node/density_test.go

@@ -476,8 +476,7 @@ func verifyPodStartupLatency(expect, actual framework.LatencyMetric) error {
 }
 
 // newInformerWatchPod creates an informer to check whether all pods are running.
-func newInformerWatchPod(f *framework.Framework, mutex *sync.Mutex, watchTimes map[string]metav1.Time,
-	podType string) *cache.Controller {
+func newInformerWatchPod(f *framework.Framework, mutex *sync.Mutex, watchTimes map[string]metav1.Time, podType string) cache.Controller {
 	ns := f.Namespace.Name
 	checkPodRunning := func(p *v1.Pod) {
 		mutex.Lock()