Move docs in `project_services/` to `user/project/services/`
-
Move project_services/touser/project/services/ -
Move project_services/project_services.mdtouser/project/services.md -
Move services_templatestouser/admin_area/services_templates -
Submit MR to EE
Needed for https://gitlab.com/gitlab-org/gitlab-ce/issues/21742