Telecom Managed Services Market Size, Share & Industry Analysis, By Service Type (Managed Data Center Services, Managed Security Services, Managed Network Services, Managed Mobility Services, Managed Infrastructure Services, and Others), By Deployment Type (On-Premise and Cloud-Based), By Organization Size (Large Enterprises and Small & Medium Enterprises (SMEs)), By End User (Telecom Operators, Healthcare, BFSI, and Others) and Regional Forecast, 2026-2034