Add `IOCTL_WINEBTH_RADIO_START_AUTH`, which gets used to implement `BluetoothAuthenticateDeviceEx`.
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v8: bluetoothapis/tests: Add tests for BluetoothAuthenticateDeviceEx.
bluetoothapis: Use a wizard GUI to respond to pairing requests if an authentication callback is not registered.
bluetoothapis: Implement BluetoothAuthenticateDeviceEx.
https://gitlab.winehq.org/wine/wine/-/merge_requests/7885