Make supervisord try harder with retries for the backend

docker/services/backend/obsclouduploadserver.conf

docker/services/backend/obsclouduploadworker.conf

docker/services/backend/obsdeltastore.conf

docker/services/backend/obsdispatcher.conf

docker/services/backend/obsdodup.conf

docker/services/backend/obspublisher.conf

docker/services/backend/obsrepserver.conf

docker/services/backend/obsscheduler@.conf.in

docker/services/backend/obsservice.conf

docker/services/backend/obsservicedispatch.conf

docker/services/backend/obssigner.conf

docker/services/backend/obssrcserver.conf

docker/services/backend/obswarden.conf