Modified command line options --authentication-kubeconfig and
--authorization-kubeconfig to point out to the correct location
of the controller-manager.conf
This should fix this controller-manager crash:
failed to get delegated authentication kubeconfig: failed to get
delegated authentication kubeconfig: stat
/etc/kubernetes/controller-manager.conf: no such file or directory
Related issue: kubernetes/kubeadm#1281
Used T.Run API for kubeadm tests in app/phases/selfhosting and
app/phases/update directories
This should improve testing output and make it more visible
which test is doing what.
