Automatic merge from submit-queue (batch tested with PRs 58783, 58800, 58846). 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>.

runtime-config bug in kube-aggregator

**What this PR does / why we need it**:

kube-aggregator api has upgraded to v1, and introduce a little bug. I have to fix it.

**Special notes for your reviewer**:
/assign @deads2k 
**Release note**:

```release-note
NONE
```