Given kubeadm 1.25 only supports kubelet 1.25 and 1.24,
1.23 related logic around dockershim can be removed.
- Don't clean the directories
/var/lib/dockershim, /var/runkubernetes, /var/lib/cni
- Pass the CRISocket directly to the kubelet
--container-runtime-endpoint flag without extra handling
of dockershim
- No longer apply the --container-runtime=remote flag
as that is the only possible value in 1.24 and 1.25
- Update unit tests
Note: we are still passing --pod-infra-container-image
to avoid the pause image to be GCed by the kubelet.
6efdcfd15b