IOBluetoothDeviceInquiry never ends

IOBluetoothDeviceInquiry never ends, despite us setting inquiry's length to 15 s. This was found as soon as a real mac (arm 64 machines) were added into CI system and tests were running. I was able to reproduce the problem with macOS 12 Beta 4 and macOS 10.15.7. It's possible it's a bug in IOBluetooth and they either really never stop (on macOS 12 I can see devices discovered even after those 15 s.) or they don't call our delegate. Anyway, we need a solution similar to what we have for CoreBluetooth device discovery.

Self-correction: on 10.15.7 it works properly, as soon as a proper entitlement ('Bluetooth') provided for an app. For macOS 12, Beta 8 - I still have this problem with scan ending far beyond the requested inquiry length (like 2 minutes instead of 15 seconds and they keep reporting devices even after inquiry is finished, so the timer is still needed).