[VK] Use Cache controller and Make create/delete pod Concurrently (#373)

* Add k8s.io/client-go/tools/cache package

* Add cache controller

* Add pod creator and terminator

* Pod Synchronizer

* Clean up

* Add back reconcile

* Remove unnecessary space in log

* Incorprate feedbacks

* dep ensure

* Fix the syntax error

* Fix the merge errors

* Minor Refactor

* Set status

* Pass context together with the pod to the pod channel

* Change to use flag to specify the number of pod sync workers

* Remove the unused const

* Use Stable PROD Region WestUS in Test

EastUS2EUAP is not reliable

manager/resource.go

@@ -113,8 +113,8 @@ func (rm *ResourceManager) UpdatePod(p *v1.Pod) bool {
 			return true
 		}
 
-		if _, ok := rm.deletingPods[podKey]; ok {
-			return false
+		if _, ok := rm.deletingPods[podKey]; !ok {
+			return true
 		}
 
 		return false