agxv: Implement VK_KHR_driver_properties
Intentionally fails dEQP-VK.api.driver_properties.conformance_version since agxv is not compliant.
Also we need to update the Vulkan headers at some point so we don't need to define VK_DRIVER_ID_MESA_AGXV
(probably during the next rebase onto asahi/main).
Signed-off-by: i509VCB git@i509.me