radv: add a no-op version of vkGetPhysicalDeviceToolPropertiesEXT()

radv: add a no-op version of vkGetPhysicalDeviceToolPropertiesEXT()

It seems the vulkan common runtime code exposes VK_EXT_tooling but
doesn't (yet) have a fallback if the backend doesn't enable this
extension. Implement it as a no-op for a temporary workaround.

This fixes crashes with dEQP-VK.api.tooling_info.*.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14707>