Automatic merge from submit-queue (batch tested with PRs 64597, 67854, 67734, 67917, 67688). 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>.

Allow ImageReview backend to add audit annotations.

**What this PR does / why we need it**: 
This can be used to create annotations that will allow auditing of the created 
pods.

The change also introduces "fail open" audit annotations in addition to the
previously existing pod annotation for fail open.  The pod annotations for 
fail open will be deprecated soon.


**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 #

**Special notes for your reviewer**:

**Release note**:
```release-note
Allow ImageReview backend to return annotations to be added to the created pod.
```