Rename "Project Services" in frontend and documentation
As part of &2504 (closed), we would like to rename all references of "Project Services" to "Integrations":
- Update places in the UI where we refer to
Project Services
(i.e. onhttp://gitlab.com/<group>/<project>/-/settings/integrations
) - Update the docs to scrub any reference to this and change to new name
Edited by Justin Ho Tuan Duong