Automatic merge from submit-queue (batch tested with PRs 63526, 60371, 63444). 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>.

update garbage collection to use the new dynamic client

Update GC to use the new and easy to use dynamic client.  This is one of two remaining stragglers.

@kubernetes/sig-api-machinery-pr-reviews 
@caesarxuchao @ironcladlou 

```release-note
NONE
```