Bluetooth: hci_sync: Convert MGMT_OP_READ_LOCAL_OOB_DATA

New functions:
  hci_read_local_oob_data_sync

This function requires all of the data from the cmd cmplt event
to be passed up to the caller via the skb.

mgmt-tester paths:
Read Local OOB Data - Not powered
Read Local OOB Data - Legacy pairing
Read Local OOB Data - Success SSP
Read Local OOB Data - Success SC

Signed-off-by: Brian Gix <brian.gix@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>