Switchgear Market Size, Share & Trends Analysis Report By Insulation (Gas-insulated Switchgears, Air-insulated Switchgears), Installation (Indoor, Outdoor), Current (AC, DC), Voltage (Low (up to 1 kV), Medium (2–36 kV), High (Above 36 kV), End User, By Region, And Segment Forecasts, 2025-2034