fix(system-upgrades): Drop drain for kubernetes upgrade on talos

This patch removes the drain section from the talos kubvernetes upgrade,
since it's not needed. The upgrade command will take care of everythin:
Drop drain for kubernetes upgrade on talos

This patch removes the drain section from the talos kubvernetes upgrade,
since it's not needed. The upgrade command will take care of everything
and run across multiple nodes, so draining a single node, doesn't help
at all.