Dashboard: replace datasource name with a reference object (#33817)

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>
Co-authored-by: Elfo404 <me@giordanoricci.com>

packages/grafana-runtime/src/utils/DataSourceWithBackend.ts

@@ -102,7 +102,7 @@ class DataSourceWithBackend<
         const ds = getDataSourceSrv().getInstanceSettings(q.datasource);
 
         if (!ds) {
-          throw new Error('Unknown Datasource: ' + q.datasource);
+          throw new Error(`Unknown Datasource: ${JSON.stringify(q.datasource)}`);
         }
 
         datasourceId = ds.id;