Automatic merge from submit-queue (batch tested with PRs 51682, 51546, 51369, 50924, 51827)
Clear values for disabled alpha fields
Fixes#51831
Before persisting new or updated resources, alpha fields that are disabled by feature gate must be removed from the incoming objects.
This adds a helper for clearing these values for pod specs and calls it from the strategies of all in-tree resources containing pod specs.
Addresses https://github.com/kubernetes/community/pull/869
f9a82dd3b7