base: restore unit dependencies are service.systemd_services

At runtime, systemd_services includes docker-* services too.
2 jobs for master in 9 minutes and 27 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Docker Build
passed #14911
docker_build_and_release_tests

00:00:50

 
  Test
passed #14912
ai3
run_full_test

00:08:36