extend testing with real Intel GPUs as part of the CI process

[okias]

Would you be interested to extend testing on hardware e.g. Intel GPUs?

If yes, we would accept connecting the libva tests to the existing Mesa3D CI. What I see as a challenge, is the GitHub x GitLab. Anyway this part could be handled by mirroring libva-utils on Freedesktop Gitlab.

I would love to hear what you think about it.