Diesel-Fired Construction Generator Sets Market Size, Share & Industry Analysis By Power Rating (< 50 kVA, > 50 -125 kVA, 125-200 kVA, 200-330 kVA, 330-750 kVA, and > 750 kVA), By Mobility (Portable, Towable, and Stationary), By End-User (Construction Contractors, Large EPC/Infrastructure Contractors, Equipment Rental and Power Rental Companies, Oil and Gas Construction, and Government and Public Infrastructure Agencies), and Regional Forecast, 2026-2034