Enabled cherrypicker for the kubernetes-sigs/apiserver-network-proxy.

[liangyuanpeng]

Enabled cherrypicker for the kubernetes-sigs/apiserver-network-proxy, and then we just comment /cherry-pick release-0.29 at PR, the bot will cherry pick this PR to release-0.29 after this PR is merged.

/assign @cheftako
/cc @jkh52

[k8s-ci-robot]

Hi @liangyuanpeng. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: liangyuanpeng
Once this PR has been reviewed and has the lgtm label, please assign chases2 for approval. For more information see the Kubernetes Code Review Process.

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[jkh52]

/ok-to-test