Attrs cleanups (#37849)

homeassistant/auth/mfa_modules/notify.py

homeassistant/auth/models.py

homeassistant/auth/permissions/models.py

homeassistant/components/camera/__init__.py

homeassistant/components/cast/helpers.py

homeassistant/components/device_tracker/setup.py

homeassistant/components/esphome/entry_data.py

homeassistant/components/mqtt/__init__.py

homeassistant/components/mqtt/device_trigger.py

homeassistant/components/mqtt/models.py

homeassistant/components/mqtt/subscription.py

homeassistant/components/stream/core.py

homeassistant/components/zha/core/store.py

homeassistant/config_entries.py

homeassistant/core.py

homeassistant/helpers/area_registry.py

homeassistant/helpers/check_config.py

homeassistant/helpers/device_registry.py

homeassistant/helpers/entity_registry.py

homeassistant/helpers/event.py