Sort imports according to PEP8 for components starting with "Z" (#29784)

* use isort to sort imports for components starting with 'z'

* add skip to end of zha/core/channels/__init__.py

* put 'pylint: disable=import-error' at the right place

* remove the import of config_flow in zha/__init__.py

According to @balloob it is no longer needed.

* revert previous commit

* isort:skip homeassistant/components/zha/__init__.py completely

homeassistant/components/zamg/sensor.py

@@ -12,18 +12,18 @@ import requests
 import voluptuous as vol
 
 from homeassistant.components.weather import (
+    ATTR_WEATHER_ATTRIBUTION,
     ATTR_WEATHER_HUMIDITY,
     ATTR_WEATHER_PRESSURE,
-    ATTR_WEATHER_WIND_SPEED,
-    ATTR_WEATHER_ATTRIBUTION,
     ATTR_WEATHER_TEMPERATURE,
     ATTR_WEATHER_WIND_BEARING,
+    ATTR_WEATHER_WIND_SPEED,
 )
 from homeassistant.const import (
-    CONF_NAME,
     CONF_LATITUDE,
     CONF_LONGITUDE,
     CONF_MONITORED_CONDITIONS,
+    CONF_NAME,
     __version__,
 )
 import homeassistant.helpers.config_validation as cv