refactor: change reconcile loop flow

Refactor reconcile loop to resemble Kubeadm controlplane controller.
Now it tries to reconcile: `etcd status`, `nodes health`, `bootstrap
status` and `kubeconfig` on each reconcile call.
This makes kubeconfig available much earlier and also different
reconcile phases do not cancel each other anymore.

Signed-off-by: Artem Chernyshev <[email protected]>
(cherry picked from commit f3cba54)

Author: Unix4ever