High Purity Germanium Tetrachloride for Optical Fiber Market Size, Share, Growth, and Industry Analysis, By Type (6N Purity, 8N Purity), By Application (Vapour Phase Axial Deposition (VAD) Preform, Outside Chemical Vapour Deposition (OVD) Preform, Plasma Activated Chemical Vapour Deposition (PCVD) Preform, Modified Chemical Vapour Deposition (MCVD) Preform), Regional Insights and Forecast to 2035