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>.
suggest using describe cmd to list pod containers
**Release note**:
```release-note
NONE
```
Usability: suggest using `kubectl describe` to obtain available pod containers when running `kubectl attach ...`
cc @soltysh