Automatic merge from submit-queue (batch tested with PRs 54336, 54470, 54334, 54175). 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>.
Update kubectl drain command to use policy V1Beta1 instead of unversioned API
**What this PR does / why we need it**:
Removes kubectl dependency on `k8s.io/kubernetes/pkg/apis/policy` by switching to `k8s.io/api/policy/v1beta1`. Part of https://github.com/kubernetes/kubectl/issues/83.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes https://github.com/kubernetes/kubectl/issues/90
**Special notes for your reviewer**:
/cc @kubernetes/sig-cli-pr-reviews
**Release note**:
```release-note
NONE
```