Support response data for APIServer::send_homeassistant_service_call

[olicooper]

Describe the Native API enhancement

I would like to fetch weather forecast updates via the HA service call weather.get_forecasts. This returns a JSON response, but APIServer::send_homeassistant_service_call does not support returning a response. There is no other way to get weather forecasts in HA v2024.4 onwards so this is the only way forward unfortunately.

This will likely also need the request object to support other request keys such as target rather than just the data and variable keys.

Use cases

This feature would allow service calls (HA actions) to return response data using the native API which will allow us to read the returned result from calling services such as weather.get_forecasts.

Anything else?

This is related to #2703 raised in April 2024 and was raised because the HA 2024.4 update broke weather forecasts in my project (see olicooper/esphome-nspanel-lovelace-native#8).