zink: emit some barriers out of renderpass where possible

zink: emit some barriers out of renderpass where possible

when emitting barriers, we don't need to end the renderpass in some cases

this handles the case of emitting barriers for new resources which have
never before been accessed and thus do not require synchronization at a
specific point in the batch

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10700>