[BUG] Epiphany does not support upgrades for Kubernetes in HA mode

[sk4zuzu]

Describe the bug
Epiphany does not support upgrades for Kubernetes in HA mode (which was introduced in 0.6.0).

To Reproduce
Create a multi-master cluster from the v0.6 branch (it will install Kubernetes 1.17.4), then try upgrading it.

Expected behavior
Multi-master Kubernetes cluster is upgraded to 1.17.7 (our current latest) without any issues on each and every node.

Config files
N/A

OS (please complete the following information):
All OS distributions Epiphany supports.

Cloud Environment (please complete the following information):
All cloud environments Epiphany supports.

Additional context
N/A

[mkyc]

@sk4zuzu can you please explain solution for that issue you plan to use?

[rafzei]

This should also refactor a part of code added to fix issue #1401. Currently, we are providing kubeconfig on nodes to go through upgrade procedure. It's required by a couple of tasks that shouldn't be run on nodes.

[przemyslavic]

The upgrade from version 0.6 to develop for K8s HA configuration (3 masters, 3 nodes) has been tested and it works fine.
There is a random issue with deploying HA clusters on Azure environments that was reported in #1075