ci: avoid triggering vc4 & v3d tests on v3dv-only MRs

There are a lot of vulkan-only MRs, so we can save a lot of CI resources
by not running GL tests as well.

Signed-off-by: Eric Engestrom <eric@igalia.com>
Reviewed-by: David Heidelberg <david.heidelberg@collabora.com>
Reviewed-by: Jose Maria Casanova Crespo <jmcasanova@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19680>
(cherry picked from commit bc286e8586976013936dea71dd66c4e3a3ff4605)
2 files changed