containerd,docker: use apt_key instead of action

we don't need rpm_key, so nothing to factor here
Ubuntu is not an ansible_os_family, the OS family for Ubuntu is Debian
Check for ansible_pkg_mgr == apt

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
(cherry picked from commit a2429ef64d)

roles/container-engine/containerd/tasks/containerd_repo.yml

@@ -1,7 +1,6 @@
 ---
 - name: ensure containerd repository public key is installed
-  action: "{{ containerd_repo_key_info.pkg_key }}"
-  args:
+  apt_key:
     id: "{{ item }}"
     url: "{{ containerd_repo_key_info.url }}"
     state: present
@@ -11,8 +10,7 @@
   delay: "{{ retry_stagger | d(3) }}"
   with_items: "{{ containerd_repo_key_info.repo_keys }}"
   environment: "{{ proxy_env }}"
-  when:
-    - ansible_os_family in ['Ubuntu', 'Debian']
+  when: ansible_pkg_mgr == 'apt'
 
 - name: ensure containerd repository is enabled
   action: "{{ containerd_repo_info.pkg_repo }}"