Add sending signal in gitlab-runner service configuration

Dodać do definicji serwisu:

docker_service_stop_command: "/usr/bin/docker kill --signal SIGQUIT {{ gitlab_runner_service_name }}"
docker_service_additional_options:
  service:
    KillSignal: "SIGQUIT"

Powiązane z https://projects.task.gda.pl/apl/gitlab-ci-runners/-/issues/88