Autonomous Train Market Analysis and Forecast to 2032: By Train Type (Metro Trains, Light Rail/Trams, Monorail, High-Speed Trains), Level of Automation (GoA 1 (Driver Assistance), GoA 2 (Partial Automation), GoA 3 (Conditional Automation), GoA 4 (Full Automation)), Application (Passenger Trains, Freight Trains, Mining Trains), and Region