High Voltage Switchgear Market Size, Share & Trends Analysis Report By Voltage Rating (220–400 kV, Above 400 kV, 36–220 kV), By Insulation Type (Gas-Insulated Switchgear (GIS), Air-Insulated Switchgear (AIS), Hybrid Switchgear), By Application (Transmission Substations, Renewable Energy Integration, Industrial Power Distribution, Railway Electrification Systems), By End Use (Utilities, Industrial, Commercial Infrastructure, Oil & Gas and Mining) and By Country (U.S., Canada) Forecasts, 2026-2034