Automatic merge from submit-queue (batch tested with PRs 62025, 63851, 64077, 63967, 63991). 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>.
switch rbac to external
The overall trajectory of the project is towards external types. Having all helpers agree on the version they operate on makes life much easier. We've already written one RBAC controller (role aggregation) and more may follow. `v1` has been around for a while now and we know that any future changes have to reliably roundtrip through it. This pull switches all the core helpers over to use the external types.
@kubernetes/sig-auth-pr-reviews
```release-note
`kubectl auth reconcile` only works with rbac.v1
```
2ff0bc2b8a