Modernize Huawei LTE (#26675)

* Modernization rework

- config entry support, with override support from huawei_lte platform in YAML
- device tracker entity registry support
- refactor for easier addition of more features
- internal code cleanups

* Remove log level dependent subscription/data debug hack

No longer needed, because pretty much all keys from supported
categories are exposed as sensors.

Closes https://github.com/home-assistant/home-assistant/issues/23819

* Upgrade huawei-lte-api to 1.4.1

https://github.com/Salamek/huawei-lte-api/releases

* Add support for access without username and password

* Use subclass init instead of config_entries.HANDLERS

* Update huawei-lte-api to 1.4.3 (#27269)

* Convert device state attributes to snake_case

* Simplify scanner entity initialization

* Remove not needed hass reference from Router

* Return explicit None from unsupported old device tracker setup

* Mark unknown connection errors during config as such

* Drop some dead config flow code

* Run config flow sync I/O in executor

* Parametrize config flow login error tests

* Forward entry unload to platforms

* Async/sync fixups

* Improve data subscription debug logging

* Implement on the fly add of new and tracking of seen device tracker entities

* Handle device tracker entry unload cleanup in component

* Remove unnecessary _async_setup_lte, just have code in async_setup_entry

* Remove time tracker on unload

* Fix to not use same mutable default subscription set for all routers

* Pylint fixes

* Remove some redundant defensive device tracker code

* Add back explicit get_scanner None return, hush pylint

* Adjust approach to set system_options on entry create

* Enable some sensors on first add instead of disabling everything

* Fix SMS notification recipients default value

* Add option to skip new device tracker entities

* Fix SMS notification recipient option default

* Work around https://github.com/PyCQA/pylint/issues/3202

* Remove unrelated type hint additions

* Change async_add_new_entities to a regular function

* Remove option to disable polling for new device tracker entries

homeassistant/generated/config_flows.py

@@ -29,6 +29,7 @@ FLOWS = [
     "heos",
     "homekit_controller",
     "homematicip_cloud",
+    "huawei_lte",
     "hue",
     "iaqualink",
     "ifttt",