Change ConfigMapsLeasesResourceLock to LeasesResourceLock

- ConfigMapsLeasesResourceLock was removed.
  kubernetes/kubernetes#117558 says "Users of
  those lock resources should move to `leases` which is safe to do in a
  single release"

pkg/flags/flags.go

@@ -48,7 +48,7 @@ const (
 	DefaultRetryPeriod = 2 * time.Second
 
 	// DefaultResourceLock is the type of resource used for the lock object.
-	DefaultResourceLock = resourcelock.ConfigMapsLeasesResourceLock
+	DefaultResourceLock = resourcelock.LeasesResourceLock
 
 	// DefaultLockObjectNamespace is the namespace which owns the lock object.
 	DefaultLockObjectNamespace string = "kube-system"