rgw: refact tasks directory layout

This commit moves containerized deployment related files to `./tasks/`
directory. This is needed to make `docker-to-podman.yml` working since
we use `tasks_from:` option.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

infrastructure-playbooks/docker-to-podman.yml

@@ -105,5 +105,5 @@
 
     - import_role:
         name: ceph-rgw
-        tasks_from: container/systemd.yml
+        tasks_from: systemd.yml
       when: inventory_hostname in groups.get(rgw_group_name, [])

roles/ceph-rgw/tasks/container/main.yml

@@ -1,3 +0,0 @@
----
-- name: include start_docker_rgw.yml
-  include_tasks: start_docker_rgw.yml

roles/ceph-rgw/tasks/main.yml

@@ -14,8 +14,8 @@
   include_tasks: start_radosgw.yml
   when: not containerized_deployment | bool
 
-- name: include_tasks container/main.yml
-  include_tasks: container/main.yml
+- name: include start_docker_rgw.yml
+  include_tasks: start_docker_rgw.yml
   when: containerized_deployment | bool
 
 - name: include_tasks multisite/main.yml