kubernetes: use util-linuxMinimal instead of util-linux.withPatches

This, and commits to k3s and util-linux close #409339.
The util-linux.withPatches API was a temporary hack for the 25.05
release to fix Kubernetes, and is going away.

While we're at it, we should use util-linuxMinimal because we do not
need things such as systemd support for kubelet initialization.

nixos/modules/services/cluster/kubernetes/kubelet.nix

···
           [
             gitMinimal
             openssh
-            # TODO (#409339): remove this patch. We had to add it to avoid a mass rebuild
-            # for the 25.05 release. Once the staging cycle referenced in the above PR completes,
-            # switch back to plain util-linux.
-            util-linux.withPatches
+            util-linuxMinimal
             iproute2
             ethtool
             thin-provisioning-tools