v3d/v3dv/ci: adjust job fractions

v3d/v3dv/ci: adjust job fractions

So far we have 12 jobs for v3d-gl (OpenGL/ES and piglit), 1 job for
v3d-traces, and 10 jobs for v3dv-vulkan, but we only have 21 rpi4
devices for testing.

So let's reduce from 12 to 10 jobs in v3d-gl, so all jobs can run
simultaneously.

Also, as the ideal goal is that each job doesn't take more than 15
minutes, let's increase a little bit the fraction for v3dv, and include
a fraction for v3d-gl as well, so all jobs are ideally under the time
limit.

Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Reviewed-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23285>