Subscriber Data Management Market Size, Share & Industry Analysis, By Solution Type (Subscriber Data Repository, Policy Management, and More), Network Type (2G/3G, 4G/LTE, and More), By Deployment Mode (Cloud, On-Premise, and Hybrid), Organization Size (Large Enterprises and Small and Medium Enterprises), End-User (Mobile Network Operators, Mobile Virtual Network Operators, and Enterprises/IoT Service Providers), and Regional Forecast, 2026-2034