Automatic merge from submit-queue

Add test for kube-proxy running with "--cleanup-iptables=true"

**What this PR does / why we need it**:
Add test to prevent such kube-proxy panic to happen again.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #48177

**Special notes for your reviewer**:
Forgot to add this in last PR #48183. Should we also add this to v1.7 milestone?
/cc @ncdc @dchen1107 

**Release note**:

```release-note
NONE
```