Instrument Transformer Market Size, Share and Global Trend By Type (Current Transformer, Potential Transformer, Combined Transformer), By Installation (Outdoor, Indoor), By Power Rating (Less than 250kV, 250kV to 500kV, Above 500kV), By Cooling (Dry Type, Oil Immersed), By Phase (Single, Three), By End-Users (Residential & Commercial, Industrial, Utility) and Regional Forecast, 2026-2034