Automatic merge from submit-queue. 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>.

Modify e2e tests to use priorityClass beta client version & switch priorityClass to beta

**What this PR does / why we need it**:
/cc @bsalamat @aveshagarwal @liggitt 

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Part of #57471

**Special notes for your reviewer**:
Once #57963 merges, this could go in.

**Release note**:

```release-note
Modify e2e tests to use priorityClass beta version & switch priorityClass feature to beta
```