Automatic merge from submit-queue (batch tested with PRs 55511, 63372, 63400, 63100, 63769). 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>.

Create pkg/scheduling/apis/v1beta1 and move priorityClass to beta 

**What this PR does / why we need it**:
This is for creating pkg/apis/scheduling/v1beta1 so that priorityClasses could be moved to beta.

**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**:
/cc @bsalamat @aveshagarwal 

**Release note**:

```release-note
The `PriorityClass` API is promoted to `scheduling.k8s.io/v1beta1`
```