70a0089ae6
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions here: https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md. KubeletPluginsWatcher feature is beta in 1.12 release *What this PR does / why we need it:* Graduates DevicePlugins feature to beta. *Which issue(s) this PR fixes:* Related but does not fix: https://github.com/kubernetes/features/issues/595 as well as https://github.com/kubernetes/kubernetes/issues/65773 *Special notes for your reviewer:* Includes upgrading the gRPC pluginwatcher API to beta. Based on the [device plugin model](https://github.com/kubernetes/kubernetes/pull/59588). *Depends on https://github.com/kubernetes/kubernetes/pull/64621 being merged* Release note: ```release-note KubeletPluginsWatcher feature graduates to beta. ``` /sig node /sig storage /cc @vladimirvivien @sbezverk @vikaschoudhary16 @saad-ali @vishh @jiayingz