Automatic merge from submit-queue (batch tested with PRs 47784, 47793, 48334, 48435, 48354)

allow a deletestrategy to opt-out of GC

Not all resources should be GC-able and we implemented an ignore list to handle this, but at the storage layer they could still set finalizers, they just hung in a stuck state forever.  This updates the strategy to allow a resource to indicate that they shouldn't be GCed.

@kubernetes/sig-api-machinery-misc