Diclofenac Market Size, Share, and Industry Analysis, By Route of Administration (Oral, Parenteral, and Topical), By Type (Prescription and Over-the-Counter (OTC)), By Indication (Acute Pain, Chronic Pain, Neuropathic Pain, and Others), By Distribution Channel (Hospital Pharmacies, Drug Stores & Retail Pharmacies, and Online Pharmacies), and Regional Forecast, 2026-2034