Unhardcode water_source to allow arbitrary liquid fields

[NetSysFire]

Is your feature request related to a problem? Please describe.

Right now only sewage, liquid cacao(?!), water and salt water have working liquid sources because they are hardcoded:

Cataclysm-DDA/src/map.cpp

Lines 5772 to 5795 in 711754c

	item map::water_from( const tripoint_bub_ms &p ) const
	{
	weather_manager &weather = get_weather();
	if( has_flag( ter_furn_flag::TFLAG_SALT_WATER, p ) ) {
	item ret( "salt_water", calendar::turn, item::INFINITE_CHARGES );
	ret.set_item_temperature( std::max( weather.get_temperature( p.raw() ),
	temperatures::cold ) );
	return ret;
	}
	if( has_flag( ter_furn_flag::TFLAG_CHOCOLATE, p ) ) {
	item ret( "liquid_cacao", calendar::turn, item::INFINITE_CHARGES );
	ret.set_item_temperature( std::max( weather.get_temperature( p.raw() ),
	temperatures::cold ) );
	return ret;
	}
	const ter_id terrain_id = ter( p );
	if( terrain_id == ter_t_sewage ) {
	item ret( "water_sewage", calendar::turn, item::INFINITE_CHARGES );
	ret.set_item_temperature( std::max( weather.get_temperature( p.raw() ),
	temperatures::cold ) );
	return ret;
	}

Solution you would like.

Rename water_source into liquid_source. Do mind the compatibility as some things do use water_source and must be adapted for the new thing. Make it an examine actor and allow an argument to specify the liquid item to be dispensed.
Also handle finite liquid sources appropriately.

Describe alternatives you have considered.

No response

Additional context

No response

[Standing-Storm]

This is what's stopping me from letting people take the black liquid from the MoM map special pools