Relocate base Bluetooth scanner code into an external library (#104930)

homeassistant/components/bluetooth/__init__.py

homeassistant/components/bluetooth/base_scanner.py

homeassistant/components/bluetooth/const.py

homeassistant/components/bluetooth/manifest.json

homeassistant/components/bluetooth/models.py

homeassistant/components/bluetooth/scanner.py

homeassistant/package_constraints.txt

requirements_all.txt

requirements_test_all.txt

tests/components/bluetooth/test_advertisement_tracker.py

tests/components/bluetooth/test_base_scanner.py

tests/components/bluetooth/test_init.py

tests/components/bluetooth/test_models.py

tests/components/bluetooth/test_scanner.py