Use auth file instead of creds in quadlet files

roles/service/tasks/additional.yaml

@@ -5,7 +5,6 @@
   vars:
     container_name: "{{ _service_additional_container.name }}"
     container_image: "{{ _service_additional_container.image | default(service_container_image) }}"
-    container_image_creds: "{{ service_container_image_creds }}"
     container_command: "{{ _service_additional_container.command | default([]) }}"
     container_user: "{{ service_container_user }}"
     container_mounts: "{{ _service_additional_container_mounts }}"