Bluetooth: hci_sync: Add LE Channel Sounding HCI Command/event structures

Bluetooth: hci_sync: Add LE Channel Sounding HCI Command/event structures

1. Implement LE Event Mask to include events required for
   LE Channel Sounding
2. Enable Channel Sounding feature bit in the
   LE Host Supported Features command
3. Define HCI command and event structures necessary for
   LE Channel Sounding functionality

Signed-off-by: Naga Bhavani Akella <naga.akella@oss.qualcomm.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>