Business Process Outsourcing Market Size, Share & Industry Analysis, By Deployment (On-premises and Cloud), By Service Type (Customer Service, Finance & Accounting, Human Resource, Sales & Marketing, and Others), By Outsourcing Type (Onshore, Nearshore, and Offshore), By Industry (BFSI, Healthcare, Manufacturing, IT & Telecom, Retail, and Others), and Regional Forecast, 2026-2034