Use auth file instead of creds in quadlet files

roles/service/tasks/main.yaml

@@ -28,7 +28,6 @@
   vars:
     container_name: "{{ service_name }}"
     container_image: "{{ service_container_image }}"
-    container_image_creds: "{{ service_container_image_creds }}"
     container_command: "{{ service_container_command }}"
     container_user: "{{ service_container_user }}"
     container_mounts: "{{ _service_container_mounts }}"