Automatic merge from submit-queue (batch tested with PRs 62208, 62114, 62144, 60460, 62214). 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>.

removes job scaler, continued

Builds on https://github.com/kubernetes/kubernetes/pull/61912 (original commit is there for credit/blame)

This keeps all the updates to the scaler building and all the test and reaper cleanup.  It just keeps a fake job scaler around for a different command path and the reaper.

/assign @p0lyn0mial 
/assign @soltysh 

```release-note
NONE
```