Automatic merge from submit-queue (batch tested with PRs 58207, 58258). 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>.

Return the correct set of supported mime types for non-streaming requests

Fixes the error response when submitting unsupported mime types to non-streaming endpoints

See https://github.com/kubernetes/kubernetes/issues/37455#issuecomment-353526250

```release-note
NONE
```