Proactive Alexa ChangeReport messages (#18114)

* Alexa: implement auth and proactive ChangeReport messages

* refactor after rebase from dev to use the new AlexaDirective and Response classes

* move to aiohttp; cleanup

* better function name

* move endpoint to config

* allow passing token function

* remove uneeded state get

* use iterable directly

Co-Authored-By: abmantis <abmantis@users.noreply.github.com>

* missing delete from previous commit

* checks for when user has no auth config

* update cloud component

* PR suggestions

* string lint

* Revert "string lint"

This reverts commit a05a1f134c9ebc7a6e67c093009744f142256365.

* linters are now happier

* more happy linters

* use internal date parser; improve json response handling

* remove unused import

* use await instead of async_add_job

* protect access token update method

* add test_report_state

* line too long

* add docstring

* Update test_smart_home.py

* test accept grant api

* init prefs if None

* add tests for auth and token requests

* replace global with hass.data

* doc lint

homeassistant/components/cloud/__init__.py

@@ -99,6 +99,8 @@ async def async_setup(hass, config):
         kwargs[CONF_GOOGLE_ACTIONS] = GACTIONS_SCHEMA({})
 
     kwargs[CONF_ALEXA] = alexa_sh.Config(
+        endpoint=None,
+        async_get_access_token=None,
         should_expose=alexa_conf[CONF_FILTER],
         entity_config=alexa_conf.get(CONF_ENTITY_CONFIG),
     )