Add kube|system_reserved CI testing

tests/files/packet_ubuntu24-calico-all-in-one.yml

@@ -22,3 +22,6 @@ containerd_registries_mirrors:
       - host: http://172.19.16.11:5000
         capabilities: ["pull", "resolve", "push"]
         skip_verify: true
+
+kube_reserved: true
+system_reserved: true