Automatic merge from submit-queue (batch tested with PRs 65832, 66160, 66145). 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>.

apiserver: make loopback logic in SecureServingOptions reusable

For reuse in other components this PR separates the loopback logic from the GenericApiServer config.