Lastfm config flow (#92299)

* Move constant values to separate file

* Move constant values to separate file

* Add config flow to lastfm

* Add tests

* Add config flow to lastfm

* Add tests

* Add tests

* Add tests

* Add extra form for main user and autofill with friends

* Add extra form for main user and autofill with friends

* Add extra form for main user and autofill with friends

* Add extra form for main user and autofill with friends

* Add OptionsFlow

* Add tests

* Fix feedback

* Fix feedback

* Fix feedback

* Fix feedback

* Fix test

* Apply suggestions from code review

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

* Update config_flow.py

* Update config_flow.py

* Update config_flow.py

* Update homeassistant/components/lastfm/config_flow.py

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

* Add tests

* Cleanup

* Update config_flow.py

* Update config_flow.py

* Update config_flow.py

* Fix test

* Fix feedback

* Codeowner lastfm

* Fix feedback

* Fix feedback

* Parametrize errors

* Parametrize errors

* Parametrize errors

* Finish tests

---------

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

CODEOWNERS

@@ -651,6 +651,8 @@ build.json @home-assistant/supervisor
 /tests/components/lametric/ @robbiet480 @frenck @bachya
 /homeassistant/components/landisgyr_heat_meter/ @vpathuis
 /tests/components/landisgyr_heat_meter/ @vpathuis
+/homeassistant/components/lastfm/ @joostlek
+/tests/components/lastfm/ @joostlek
 /homeassistant/components/launch_library/ @ludeeus @DurgNomis-drol
 /tests/components/launch_library/ @ludeeus @DurgNomis-drol
 /homeassistant/components/laundrify/ @xLarry