Bluetooth: ISO: Fix defer tests being unstable

Bluetooth: ISO: Fix defer tests being unstable

iso-tester defer tests seem to fail with hci_conn_hash_lookup_cig
being unable to resolve a cig in set_cig_params_sync due a race
where it is run immediatelly before hci_bind_cis is able to set
the QoS settings into the hci_conn object.

So this moves the assigning of the QoS settings to be done directly
by hci_le_set_cig_params to prevent that from happening again.

Fixes: 26afbd826ee3 ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>