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Kubernetes Submit Queue authored
Automatic merge from submit-queue (batch tested with PRs 58437, 59490, 55684). 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>. gRPC-based KMS plugin service **What this PR does / why we need it**: Implement for issue https://github.com/kubernetes/kubernetes/issues/51965 **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes #51965 **Special notes for your reviewer**: @destijl @sakshamsharma @deads2k @ericchiang The implementation based on the document https://docs.google.com/document/d/1S_Wgn-psI0Z7SYGvp-83ePte5oUNMr4244uanGLYUmw/edit **Release note**: ```release-note Implement envelope service with gRPC, so that KMS providers can be pulled out from API server. ```