Automatic merge from submit-queue

Remove proxy-mode annotation from kube-proxy

**What this PR does / why we need it**:
This removes the net.experimental.kubernetes.io/proxy-mode and net.beta.kubernetes.io/proxy-mode annotations from kube-proxy.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #40582 

**Special notes for your reviewer**:

**Release note**:

```release-note
Remove outdated net.experimental.kubernetes.io/proxy-mode and net.beta.kubernetes.io/proxy-mode annotations from kube-proxy.
```