Add cloudhook support to SmartThings component (#21905)

* Add support for Nabu Casa cloudhooks

* Added tests to cover cloudhook creation and removal

* Remove cloud dependency

tests/components/smartthings/conftest.py

@@ -85,7 +85,8 @@ def app_fixture(hass, config_file):
         'appType': 'WEBHOOK_SMART_APP',
         'classifications': [CLASSIFICATION_AUTOMATION],
         'displayName': 'Home Assistant',
-        'description': "Home Assistant at " + hass.config.api.base_url,
+        'description':
+            hass.config.location_name + " at " + hass.config.api.base_url,
         'singleInstance': True,
         'webhookSmartApp': {
             'targetUrl': webhook.async_generate_url(