Gastrointestinal Stent Market Size, Share & Industry Analysis, By Product Type (Biliary Stents, Duodenal Stents, Colonic Stents, Esophageal Stents, and Others), By Material (Metal, Plastic, and Others), By Application (Biliary Disease, Colorectal Cancer, Inflammatory Bowel Disease, Esophageal Cancer, Gastric/Duodenal Cancer, and Others), By End-user (Hospitals & ASCs, Clinics, and Others), and Regional Forecast, 2026-2034