ci: Drop the git dependency in tracie

ci: Drop the git dependency in tracie

Instead of using git, use python and the Gitlab API
to fetch traces. This helps us slim down our ramdisks
in preparation for integrating trace replay on LAVA
devices.

Signed-off-by: Rohan Garg <rohan.garg@collabora.com>
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4000>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4000>