Unified Communication & Collaboration (UC&C) Market Size, Share & Industry Analysis, By Type (Telephony, Conferencing, Unified Messaging, Collaboration Platform, and Others), By Deployment (Hosted and Cloud), By Enterprise Type (Large Enterprises and SMEs), By Industry (BFSI, IT & IT-enabled Services, Telecom, Education, Retail, Government, Healthcare, and Others), and Regional Forecast, 2026–2034