nir,util: move printf serializing into util there's nothing NIR specific here and these routines will be useful otherwise. Signed-off-by: Alyssa Rosenzweig <[email protected]> Reviewed-by: Jesse Natalie <[email protected]> Reviewed-by: Lionel Landwerlin <[email protected]> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33067>