zink: wrap framebuffer surfaces to preserve gallium expectations

zink: wrap framebuffer surfaces to preserve gallium expectations

gallium needs pipe_surface::context to reflect the context used to create
the surface, but zink caches surfaces, so instead return a wrapper object
that can be destroyed without blowing up the stack

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12843>