Contact Center as a Service (CCaaS) Market Size, Share, and COVID-19 Impact Analysis, By Function (Interactive Voice Response (IVR), Multichannel, Automatic Call Distribution, Computer Telephony Integration (CTI), Reporting and Analytics, Workforce Optimization, Customer Collaboration, and Others), By Enterprise Type (SMEs and Large Enterprises), By Industry (BFSI, IT & Telecommunications, Government, Healthcare, Consumer Goods & Retail, Travel & Hospitality, Media & Entertainment, and Others), and Regional Forecast, 2023-2030