tests/ieee802154_hal: add support for ack_req flag
tests/ieee802154_hal: add support for ack_req flag

Co-authored-by: Michel Rottleuthner <c435b31412899c238a147a4f1ebfe5159d55b2ff@haw-hamburg.de>

miri64/RIOT,kaspar030/RIOT,ant9000/RIOT,RIOT-OS/RIOT,miri64/RIOT,kYc0o/RIOT,ant9000/RIOT,ant9000/RIOT,jasonatran/RIOT,jasonatran/RIOT,miri64/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,miri64/RIOT,ant9000/RIOT,kaspar030/RIOT,jasonatran/RIOT,miri64/RIOT,ant9000/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,kYc0o/RIOT,kaspar030/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,kYc0o/RIOT,kaspar030/RIOT