fix: loading datasource unable to process a regular default export (#…

…10184)

The solution to `loadDataSource` was probably designed to adapt to various forms of exports coming from ormconfig.js however it failed to adapt to a very regular case where you just do `module.exports = new DataSource({ ... })` resulting in `Error: Given data source file must contain export of a DataSource instance`

Fixes #8810

src/commands/CommandUtils.ts

@@ -33,6 +33,10 @@ export class CommandUtils {
             )
         }
 
+        if (InstanceChecker.isDataSource(dataSourceFileExports)) {
+            return dataSourceFileExports
+        }
+
         const dataSourceExports = []
         for (const fileExportKey in dataSourceFileExports) {
             const fileExport = dataSourceFileExports[fileExportKey]