radv: advertise VK_EXT_robustness2

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <mesa/mesa!4775>
24 jobs for !4775 with radv_VK_EXT_robustness2 in 10 minutes and 3 seconds (queued for 3 seconds)
merge request