Revert RKE2 upgrades to 1.28.9, 1.27.13, 1.26.15
The goal is to workaround #1347, by reverting the upgrade of RKE2 that was done in !2268 (merged).
Since kubeadm is not impacted by #1347, this MR does not downgrade the versions used for kubeadm.
Depends on:
Edited by Thomas Morin