Add Entur departure information sensor (#17286)

* Added Entur departure information sensor.

* Fixed houndci-bot comments.

* Removed tailing whitespace.

* Fixed some comments from tox lint.

* Improved docstring, i think.

* Fix for C1801

* Unit test for entur platform setup

* Rewritten entur component to have pypi dependecy.

* Propper client id for api usage.

* Minor cleanup of usage of constants.

* Made location output configurable.

* Cleaned up usage of constants.

* Moved logic to be contained within setup or update methods.

* Moved icon consts to root in module.

* Using config directly in test

* Minor changes

script/gen_requirements_all.py

@@ -46,6 +46,7 @@ TEST_REQUIREMENTS = (
     'coinmarketcap',
     'defusedxml',
     'dsmr_parser',
+    'enturclient',
     'ephem',
     'evohomeclient',
     'feedparser',