DBus UID override

[kiwiz]

Is your feature request related to a problem? Please describe.
I got around to testing home-assistant/core#89925, which includes the dbus-fast changes to override the DBus UID: Bluetooth-Devices/dbus-fast#188 Bluetooth-Devices/dbus-fast#193. I tried adding support for this in bleak via hbldh/bleak#1182. Unfortunately, I didn't realize that bluetooth-adapters also uses dbus-fast:

bluetooth-adapters/src/bluetooth_adapters/dbus.py

Line 94 in 7932014

bus = await MessageBus(bus_type=BusType.SYSTEM).connect()

(which results in bluetooth failing to initialize). For now, I've worked around this locally by just patching dbus-fast's auth.py.

Describe the solution you'd like
Some mechanism for overriding the UID in bluetooth-adapters? I'm not sure what the best strategy is here. BLEAK_DBUS_AUTH_UID already exists. On one hand, it doesn't make sense for this library to depend on that env var. On the other, adding a new env var would require setting both.

Additional context

[bdraco]

If you propose a code change/PR for all libaries/apps involved I can probably give you some more constructive feedback.

[bdraco]

AFAICT this is complete. Let me know if thats not the case