Hosted PBX Market Size, Share, and Industry Analysis By Component (Solution and Services), By Enterprise Type (Large Enterprises and Small and Medium Sized Enterprises (SMEs)), By Application (Unified Communication and Collaboration, Mobility, Call Center, and Others), By End-user (BFSI, Healthcare, Government, Manufacturing, Energy & Utilities, IT & Telecom, Travel & Hospitality, and Others), and Regional Forecast, 2026-2034