Railway Carbon Emission Reduction Technology Market Size, Share, and Industry Analysis by Technology (Rail Electrification Systems, Battery-Electric Propulsion Systems, Hydrogen Fuel Cell Technologies, Hybrid Propulsion Systems, Regenerative Braking Systems, Digital Energy Management & Optimization Systems, and Others), By Application (Freight Transport, Passenger Transport, and Urban Transit), By Locomotive Type (Diesel Locomotives, Electric Locomotives, and Others), By Sales Channel (OEM and Aftermarket), and Regional Forecast, 2026-2034