gitlab-ci: Always name artifacts archive after the job producing it

This will help determine which artifacts generate how much traffic.

v2:
* Add "mesa_" prefix to make it obvious which project the artifacts are
  from.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4085>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4085>
2 files changed