Europe Retort Pouch Market Size, Share & Trends Analysis Report By Material (Polypropylene, Polyethylene, Polyamide, PET, Aluminum Foil, Others), By Packaging Type (Stand-up Pouches, Flat Pouches), By Closure Type (Tear Notch, Zipper, Spout), By Application (Food, Beverage, Pet Food, Others) and By Country (U.K., Germany, France, Spain, Italy, Russia, Nordic, Benelux, Rest of Europ) Forecasts, 2026-2034