treewide: move some services to start before the start-indicator

We have two services that indicate boot finish. Those are start-indicator and rainbow. They have start level 99 but these services have it set as well and thus sometimes start after indicator. The result is that tests relying on indicator can initially fail because they just start too early. It is also a good idea to just not keep 99 level for use like start-indicator so this moves all services to earlier level rather than just affected ones.