Automatic merge from submit-queue (batch tested with PRs 47309, 47187)

Add IPv6 test cases to kube-proxy server test.

**What this PR does / why we need it**: This change adds some IPv6 test cases for the kube-proxy server. Also adds some test cases for negative conditions for better test coverage.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #47313

**Special notes for your reviewer**:

**Release note**:

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