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>.
update restmapping to indicate fully qualified resource
The resource of a restmapping is logically fully qualified and we have that value when we construct it. Update the return value so that callers don't have to synthentically create one.
@kubernetes/sig-api-machinery-pr-reviews
```release-note
NONE
```
a30f459160