Automatic merge from submit-queue. 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>.

scheduler: align with ctrl-managers and apiservers, add https+auth in options

This switches the bootstrapping code to use the Options+Config pattern which
allows to compose flag sets and flag logic from reusable components.

This way https+authz+authn support is added to the Options struct (still disabled
for the actual binary, but available for downstreams).

TODOs:
- [x] fix kubeadm