Automatic merge from submit-queue (batch tested with PRs 56217, 56268, 56263, 56328, 56200). 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>. kube-apiserver: integration test to smoke test OpenAPI aggregation Replaces https://github.com/kubernetes/kubernetes/pull/51715. This is mostly https://github.com/kubernetes/kubernetes/pull/51715, but rebased to current master.