Automatic merge from submit-queue (batch tested with PRs 47509, 46821, 45319, 49121, 49125)

api types: fix protobuf names that are different from JSON name

This PR fixes the naming of protobuf fields that are mismatched when compared to the JSON names. Because protobuf names aren't actually used during serialization, just the index, I think we can update these safely without changing the over the wire encoding (note that generated.pb.go doesn't change).

Can someone verify that fixing the name won't impact backward compatibility?

cc @kubernetes/sig-api-machinery-pr-reviews 

Fixes https://github.com/kubernetes/kubernetes/issues/45183

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