Postgres: For template queries return [] and not error (#38060)

* Postgres: For template queries return [] and not error

* remove the console error

* update mssql and mysql

Co-authored-by: Ying WANG <ying.wang@grafana.com>

public/app/plugins/datasource/mysql/datasource.ts

@@ -157,6 +157,9 @@ export class MysqlDatasource extends DataSourceWithBackend<MySQLQuery, MySQLOpti
         .pipe(
           map((rsp) => {
             return this.responseParser.transformMetricFindResponse(rsp);
+          }),
+          catchError((err) => {
+            return of([]);
           })
         )
     );