Fix ownership related to Calico (#8072)

kube-bench scan outputs warning related to Calico like:

* text: "Ensure that the Container Network Interface file
  permissions are set to 644 or more restrictive (Manual)"
* text: "Ensure that the Container Network Interface file
  ownership is set to root:root (Manual)"

This fixes these warnings.

roles/container-engine/gvisor/molecule/default/prepare.yml

@@ -36,7 +36,7 @@
       file:
         path: /etc/cni/net.d
         state: directory
-        owner: kube
+        owner: root
         mode: 0755
     - name: Setup CNI
       copy:

roles/network_plugin/calico/tasks/install.yml

@@ -20,7 +20,7 @@
   template:
     src: "cni-calico.conflist.j2"
     dest: "/etc/cni/net.d/calico.conflist.template"
-    owner: kube
+    owner: root
   register: calico_conflist
   notify: reset_calico_cni