fix(性能测试): 删除测试报告时删除相关的jtl

backend/src/main/java/io/metersphere/performance/service/ReportService.java

@@ -105,6 +105,9 @@ public class ReportService {
         example.createCriteria().andReportIdEqualTo(reportId);
         loadTestReportDetailMapper.deleteByExample(example);
 
+        // delete jtl file
+        fileService.deleteFileById(loadTestReport.getFileId());
+
         loadTestReportMapper.deleteByPrimaryKey(reportId);
     }