Optical Fiber and Plastic Conduit Market Size & Forecasts 2026-2035, By Segments (Product Type, Diameter, Application, Material), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Corning, Prysmian Group, OFS, Sumitomo Electric, Furukawa Electric)