bluetooth: audio: ascs: Fix Codec Config initiated by server

The Codec Specific Configuration Parameters provided by server was
not copied at bt_ascs_config_ase. Detected by PTS in BAP/USR/SCC PTS
test cases, because no LTV values appeared in ASE Codec Configured
notification.

Signed-off-by: Magdalena Kasenberg <magdalena.kasenberg@codecoup.pl>