zink: add pipe_context::get_timestamp hook

this uses VK_EXT_calibrated_timestamps to read a timestamp immediately from
the device without using a batch, which is what the gallium api expects

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6923>
1 file changed