Update to upstream v1.9.1
    
    * Update sources, version and commit
    * Add kubeadm manpage
    * s/current_platform/host_platform/
      current_platform has been removed
    * rm 'rm src/k8s.io/kubernetes/cluster/gce/gci/mounter/mounter'
      file doesn't exist anymore
    * Rebase build-with-debug-info.patch and
      use_go_build-is-not-fully-propagated-so-make-it-fixe.patch
    * Remove Patch12
      The federation apiserver and controller-manager are removed
      from the kuberbetes repo
    * Patch for version comparison [1]
    
    [1] https://github.com/kubernetes/kubernetes/pull/58207