Bluetooth: controller: Reject CIS_TERMINATE when unsupported for role

If a central or peripheral is not configured for ISO connected streams,
reject a remote LL_CIS_TERMINATE_IND procedure, responding with an
unsupported feature error (BT_HCI_ERR_UNSUPP_FEATURE).

This fixes EBQ test /LL/PAC/CEN/BV-01-C.

Signed-off-by: Morten Priess <mtpr@oticon.com>