roles/ca: new apt multipackage ansible style

roles/ca/tasks/main.yaml

@@ -10,15 +10,14 @@
 
 - name: install ca packages
   apt:
-    name: "{{ item }}"
+    pkg:
+      - python3
+      - python3-pip
+      - python3-setuptools
     state: present
     update_cache: yes
     cache_valid_time: 3600
     install_recommends: '{{ install_recommends | default("no") }}'
-  with_items:
-    - python3
-    - python3-pip
-    - python3-setuptools
 
 - name: install from release
   pip: