See #317

Definition of done:

• full end-user documentation - README.md + revise this document - Expand documentation for end to end workflows with external HMS #1458
• integration test for AWS Glue - Added integration tests with external HMS & Glue #1408, Fixed integration tests failing on workspaces with external hms cluster policies #1368
• integration test for MSSQL - Added integration tests with external HMS & Glue #1408, Fixed integration tests failing on workspaces with external hms cluster policies #1368
• integration test for assessment -> table-migration for external tables Added integration tests with external HMS & Glue #1408, Add assessment workflow test with external hms #1460