Automatic merge from submit-queue (batch tested with PRs 56894, 56940, 55223, 56554, 54985). 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>.

Fix protobuf generator for aliases to repeated types

Currently if a type has an alias the generator will fail generating protobuf. This prevents the problem.

```release-note
NONE
```