zink: only stall during query destroy for xfb queries

zink: only stall during query destroy for xfb queries

xfb queries allocate vk buffer objects in the underlying driver which
can be deallocated while an xfb query is in-flight if we attempt to
defer it due to the way that gl xfb is translated to vk, so we need to
continue forcing this behavior in that case

for other query types, we can safely defer here until the current batch has
finished rather than block

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5533>