Automotive Thermoelectric Generator Market Size, Share Demand Report By Material Type (Bismuth Telluride, Lead Telluride, Silicon Germanium, Skutterudite, Others), By Vehicle Type (Passenger Vehicles, Commercial Vehicles, Hybrid Vehicles, Electric Vehicles, Heavy-Duty Trucks), By Application (Waste Heat Recovery Systems, Battery Charging Systems, HVAC Energy Systems, Engine Thermal Management, Auxiliary Power Generation), By Sales Channel (OEMs, Aftermarket), By Region & Segment Forecasts, 2025–2034