Stem Cell Assay Market, By Product Type (Instruments and Reagents & Kits), By Cell Type (Adult Stem Cells and Human Embryonic Stem Cells), By Process (Cell Culture, Engineering, Differentiation, Characterization, and Others), By Application (Research, Drug Discovery & Development, and Regenerative Medicine), and By Region - Global Industry Insights, Trends, Outlook, and Opportunity Analysis, 2022-2028