Only use stat get_checksum: yes when needed (#7270)

By default Ansible stat module compute checksum, list extended attributes and find mime type
To find all stat invocations that really use one of those:
git grep -F stat. | grep -vE 'stat.(islnk|exists|lnk_source|writeable)'

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

roles/download/tasks/download_container.yml

@@ -24,6 +24,9 @@
     - name: download_container | Determine if image is in cache
       stat:
         path: "{{ image_path_cached }}"
+        get_attributes: no
+        get_checksum: no
+        get_mime: no
       delegate_to: localhost
       connection: local
       delegate_facts: no