Digital Twin Market Size, Share & COVID-19 Impact Analysis, By Type (Parts Twin, Product Twin, Process Twin, and System Twin), By Application (Predictive Maintenance, Business Optimization, Product Design & Development, and Others), By End-user (Aerospace & Defense, Automotive & Transportation, Manufacturing, Healthcare, Retail, Energy & Utilities, Real Estate, IT and Telecom, and Others), and Regional Forecast, 2023-2030