Business Spend Management (BSM) Software Market Size, Share & Industry Analysis, By Solution (Procure-to-Pay Solutions, Supplier & Risk Management, Travel & Expense Management, Contract & e-Tender Management, Spend Management/Spend Analytics, and Others (Source-To-Contract, Treasury Management)), By Deployment (Cloud and On-premise), By Enterprise Type (SMEs and Large Enterprises), By End-user (BFSI, Travel & Tourism, Hospitality, Healthcare, IT & Telecom, Energy & Utility, Retail & E-Commerce, and Others (Logistics and Education)), and Regional Forecast, 2026-2034