zink: fix/improve handling for multi-component bitfield ops

zink: fix/improve handling for multi-component bitfield ops

the original improvement for this correctly handled cases where
the offset/count values were swizzled with .xxxx, but it was broken
for any other swizzling

this adds a nir pass to more easily manipulate the swizzles and rewrite
the multi-component ops as multiple ops with the swizzled params

fixes #6697

Fixes: 8e97f51c676 ("zink: handle swizzled offset/count values for shader bitfield ops")

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18706>