container: rename docker directories

Those 2 directories should be renamed to be more generic (docker vs.
podman).

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

roles/ceph-rbd-mirror/tasks/main.yml

@@ -24,5 +24,5 @@
       set_fact:
         container_exec_cmd: "{{ container_binary }} exec ceph-rbd-mirror-{{ ansible_hostname }}"
 
-    - name: include docker/main.yml
-      include_tasks: docker/main.yml
+    - name: include container/main.yml
+      include_tasks: container/main.yml

roles/ceph-rgw/tasks/main.yml

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