Bluetooth: host: Save CCC data on pairing complete

Fixes issue #39989.

Save CCC data on pairing complete by replacing private addresses
for the just bonded device with its public address in CCC attributes'
CFG arrays. This is then followed by calls to bt_gatt_store_ccc
and bt_gatt_store_cf for the just bonded device.

Signed-off-by: Jim Benjamin Luther <jilu@oticon.com>