Steel Ingots Market Size, Share & Industry Analysis, By Steel Category (Carbon Steel, Alloy Steel, Stainless Steel, and Tool & Die Steel Ingots), By Manufacturing Process (Continuous Casting, Conventional Ingot Casting, Vacuum Ingot Casting, and Electroslag Remelting), By Subsequent Processing (Rolling & Direct Mill Product Conversion, Forging, and Remelting & Recasting), By End-Use Industry (Construction & Infrastructure, Automotive & Transportation, Industrial Machinery & Heavy Equipment, Energy & Power, Oil & Gas, Shipbuilding, and Aerospace & Defense), and Regional Forecast, 2026-2034