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/docker/tasks/main.yml

@@ -54,8 +54,7 @@
 - import_tasks: pre-upgrade.yml
 
 - name: ensure docker-ce repository public key is installed
-  action: "{{ docker_repo_key_info.pkg_key }}"
-  args:
+  apt_key:
     id: "{{ item }}"
     url: "{{ docker_repo_key_info.url }}"
     state: present
@@ -65,7 +64,7 @@
   delay: "{{ retry_stagger | d(3) }}"
   with_items: "{{ docker_repo_key_info.repo_keys }}"
   environment: "{{ proxy_env }}"
-  when: not (ansible_os_family in ["Flatcar Container Linux by Kinvolk", "RedHat", "Suse", "ClearLinux"] or is_ostree)
+  when: ansible_pkg_mgr == 'apt'
 
 - name: ensure docker-ce repository is enabled
   action: "{{ docker_repo_info.pkg_repo }}"