
We can use the general "how parallel should we go on this runner?" env var and save a bunch of massaging env var names. Fixes how PIGLIT_PARALLEL looked like it was useful but actually wasn't passed through to HW runners. Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com> Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13372>