Automatic merge from submit-queue. 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>.

add help description and examples to wait

**Release note**:
```release-note
NONE
```

Adds --help description and examples to the `wait` command.

cc @soltysh