anv: fixup descriptor copies

anv: fixup descriptor copies

I did not properly understood that we cannot access the views written
to the descriptor sets because they might have been destroyed after
the write operation and the copy operation is allowed to copy what is
invalid data. The shader just can't access it.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 03e1e19246 ("anv: Refactor descriptor copy")
Reviewed-by: Ivan Briano <ivan.briano@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20222>