Add Enphase Envoy component (#15081)

* add enphase envoy component

* Add Enphase Envoy component for energy monitoring

* Fix formatting problems

* Fix formatting errors

* Fix formatting errors

* Fix formatting errors

* Change unit of measurement to W or Wh. Return sensor states as integers

* Fix formatting errors

* Fix formatting errors

* Fix formatting errors

* Move import json to update function

* Fix formatting. Add file to .coveragerc

* Add new component to requirements_all.txt

* Move API call to third party library on PyPi

* Refactor

* Run gen_requirements_all.py

* Minor refactor

* Fix indentation

* Fix indentation