Use connection: local when delegate_to: localhost (#6322)

This will avoid SSH connection on the local host

roles/download/tasks/download_container.yml

@@ -25,6 +25,7 @@
       stat:
         path: "{{ image_path_cached }}"
       delegate_to: localhost
+      connection: local
       delegate_facts: no
       register: cache_image
       changed_when: false