Remove auxiliary heating

[robigan]

Resolves the error vimar::VimarClimate implements the is_aux_heat property or uses the auxiliary heater methods in a subclass of ClimateEntity which is deprecated and will be unsupported from Home Assistant 2024.10. Please create a bug report at https://github.com/h4de5/home-assistant-vimar/issues

Opening PR to discuss how to implement boost heating. Home assistant docs say that we should implement the Aux heat functionality as a switch part of the device