[NixOS] Renable containerd cdi

nixos/k3s.nix

@@ -39,6 +39,16 @@ in {
       enableGarbageCollect = true;
     };
 
+    virtualisation.containerd = {
+      enable = true;
+      settings = {
+        plugins."io.containerd.grpc.v1.cri" = {
+          enable_cdi = true;
+          cdi_spec_dirs = [ "/var/run/cdi" ];
+        };
+      };
+    };
+
     systemd.services.mount-railbird-bucket = {
       after = ["agenix.service"];
       wantedBy = [ "multi-user.target" ];