Fixes#71730
0 indicates standby, 1 indicates master, label indicates which lease.
Tweaked name and documentation
Factored in Mike Danese feedback.
Removed dependency on prometheus from client-go using adapter.
Centralized adapter import.
Fixed godeps
Fixed boilerplate.
Put in fixes for caesarxuchao
This moves plugin/pkg/scheduler to pkg/scheduler and
plugin/cmd/kube-scheduler to cmd/kube-scheduler.
Bulk of the work was done with gomvpkg, except for kube-scheduler main
package.