Automatic merge from submit-queue (batch tested with PRs 44469, 44566, 44467, 44526)

WaitForCacheSync before running attachdetach controller

@gnufied you wrote the test and @ncdc the TODO comment. Let's just run the pv and pvc informers, we do not care about them in this test. But we want to be able to stop the pod Informer at will, hence not just using informers.Start, is my understanding.
```release-note
NONE
```