Heavy Commercial Vehicles Market Size, Share & Industry Analysis, By Powertrain (ICE, BEV, HEV/PHEV, LPG & Others, and Fuel Cell), By Class (Class 7 and Class 8), By Type (Tractor Units (6x4 Axle, 6x6 Axle, and Others) and Rigid Trucks (Curtain-side Truck, Box Truck, Refrigerated Truck, Tipper Truck, Tanker Truck, Flatbed Truck, and Others)), By Application (Transportation, Construction, Mining, and Agriculture), and Regional Forecast, 2026-2034