rusticl/mem: do not apply offset with in copy_image_to_buffer

The offset already gets applied when mapping the destination buffer, so we
ended up applying it twice.

Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33426>

src/gallium/frontends/rusticl/core/memory.rs

@@ -1484,7 +1484,6 @@ impl Image {
         dst_offset: usize,
         region: &CLVec<usize>,
     ) -> CLResult<()> {
-        let dst_offset = dst.apply_offset(dst_offset)?;
         let bpp = self.image_format.pixel_size().unwrap().into();
 
         let src_pitch;