Make dev.gitlab.org use CI_TOOLS from its own instance

See merge request https://gitlab.com/gitlab-org/build/CNG/-/merge_requests/2221



Merged-by: Balasankar 'Balu' C <balasankar@gitlab.com>
Approved-by: Jason Plum <jplum@gitlab.com>
Approved-by: Balasankar 'Balu' C <balasankar@gitlab.com>
Co-authored-by: João Cunha <j.a.cunha@gmail.com>