We are about to rename mupuf/valve-infra into gfx-ci/ci-tron.
While most resources will transparently be redirected, gitlab does
not allow us to keep our containers during the migration.
To work around that, I uploaded the current containers to Eric's fork
of valve-infra. Let's use these containers until the migration is over!
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25593>