Automatic merge from submit-queue (batch tested with PRs 65152, 65199, 65179, 64598, 65216). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Remove optimization from getWork in resourcequota/controller.go

**What this PR does / why we need it**:
This change simplifies the code in
plugin/pkg/admission/resourcequota/controller.go by removing the
optimization in getWork that required the caller to NOT call
completeWork if getWork returns the empty list of work.  BTW, the
caller was not obeying that requirement; now the caller's behavior
(which is unchanged) is right.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #63608 

**Special notes for your reviewer**:
This is a simpler alternative to #64377 

**Release note**:

```release-note
NONE
```