gitlab-ci: add a job that runs Vulkan CTS with RADV conditionally

gitlab-ci: add a job that runs Vulkan CTS with RADV conditionally

Only Polaris10 is tested at the moment, and I disabled a TON of
tests to keep a CTS run within 5 minutes because my local runner
is a bit slow. A full CTS run takes more than 1h, which means it
will hit the timeout.

RADV CI can only be triggered manually on personal branches to
avoid breaking the world because one runner is definitely not
enough. This will allow us to test it until it's stable enough
to be enabled by default.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Acked-by: Michel Dänzer <mdaenzer@redhat.com>