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>..

[Federation] Update hpa e2e utils to enable reuse in fed hpa tests

This PR is to enable reuse of some hpa e2e utils in federation, facilitating https://github.com/kubernetes/kubernetes/pull/50168
cc @mwielgus @quinton-hoole 
cc @kubernetes/sig-federation-pr-reviews 

**Release note**:

```NONE
```