Add Config Flow to LG Netcast (#104913)

* Add Config Flow to lg_netcast

* Add YAML import to Lg Netcast ConfigFlow

Deprecates YAML config support

* Add LG Netcast Device triggers for turn_on action

* Add myself to LG Netcast codeowners

* Remove unnecessary user_input validation check.

* Move netcast discovery logic to the backend

* Use FlowResultType Enum for tests

* Mock pylgnetcast.query_device_info instead of _send_to_tv

* Refactor lg_netcast client discovery, simplify YAML import

* Simplify CONF_NAME to use friendly name

Fix: Use Friendly name for Name

* Expose model to DeviceInfo

* Add test for testing YAML import when not TV not online

* Switch to entity_name for LGTVDevice

* Add data_description to host field in user step

* Wrap try only around _get_session_id

* Send regular request for access_token to ensure it display on the TV

* Stop displaying access token when flow is aborted

* Remove config_flow only consts and minor fixups

* Simplify media_player logic & raise new migration issue

* Add async_unload_entry

* Create issues when import config flow fails, and raise only a single yaml deprecation issue type

* Remove single use trigger helpers

* Bump issue deprecation breakage version

* Lint

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Co-authored-by: Erik Montnemery <erik@montnemery.com>