Automatic merge from submit-queue (batch tested with PRs 55642, 55897, 55835, 55496, 55313). 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>.

add rest/request backoffMgr and throttle setters

**Release note**:
```release-note
NONE
```

Allows modifications to be made to a request's rate-limiter and backoff manager
from a `RequestOptions` func introduced in https://github.com/kubernetes/kubernetes/pull/55834

Depends on https://github.com/kubernetes/kubernetes/pull/55834

@enj @smarterclayton