Automatic merge from submit-queue (batch tested with PRs 51929, 52015, 51906, 52069, 51542). 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>..

Support IPVS Flush API

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

Currently, we implement IPVS flush API by deleting IPVS services one by one, which is inefficient.

**Which issue this PR fixes**: 

fixes #52070

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```