hci: add hci_get_stack for testing

hci: fix emit cis/bis created

gap: add gap_request_connection_subrating

hci: enable connection subrating during init

hci: store ssp io capability request reply auth requirements in connection

hci: increase incoming pre-buffer for LE-only for service_id + connection_id

hci: prepare connection struct if advertisement set terminated arrives before le connection complete

hci: remove bool from hci_reserve_packet_buffer and similiar higher layer functions

hci: implement gap_cig_remove

gap: support coordinated private random address updates

hci: rename hci_extended_advertising_supported

hci: make hci_extended_advertising_supported public

gap: set IRK for undirected advertising

hci: add hci_is_le_identity_address_type

hci: provide hci_is_le_connection_type

hci: provide hci_classic_supported and hci_le_supported

sm: use bool for sm_connection_sc

sm: use bool for sm_pairing_requested

sm: use bool for sm_security_request_received

hci: use bool in conditions

att_server: use bool for ir_lookup_active and pairing_active

hci: fix build

hci: add workaround for Controllers that fail to send command complete/status for connection that does not get established

hci: configure Classic ACL packet types with hci_enable_acl_packet_types

hci: add ISO header to reassembly buffer