panfrost/ci: Use Volt-based runner for dEQP tests

panfrost/ci: Use Volt-based runner for dEQP tests

It's able to run tests in parallel, fully utilizing the HW and
shortening considerable the time it takes.

Needed to disable tests in RK3288 for now because Volt doesn't support
armhf yet, though this should be fixed soon.

Tests are now run with --deqp-gl-config-name=rgba8888d24s8ms0, so we are
hitting a few more failures in tests that previously were being skipped.

The time to run the tests decreases from around 8 minutes to 1:45
minutes, allowing for extending coverage without increasing CI times too
much.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>