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>. Add checking HPA_USE_REST_CLIENTS Add checking HPA_USE_REST_CLIENTS in addition to ENABLE_METRICS_SERVER when disabling REST clients use for HPA. ```release-note NONE ```