radv: Delete lots of sync code.

radv: Delete lots of sync code.

This make things all fall back to the common synchronization functions
which will switch things to the new submission path and to use
vk_fence and vk_semaphore.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
radv: Use common AcquireNextImage2KHR.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
radv: Use common functions for Metro Exodus layer.

Needs to be squashed with the big "switch the world" deletion patch
but kept it separate for review.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13974>