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>.
rename mustrunas to capabilities
The file context has nothing to do with `mustrunas`, so it's quite
odd to use `mustrunas` as the file name. I guess it's copied from other
places.
**Release note**:
```release-note
NONE
```
fixes#57227
722cb7a758