fix(测试跟踪): 测试计划性能测试执行失败没有显示失败原因

--bug=1024534 --user=李玉号 【测试跟踪】测试计划-性能测试用例-鼠标放到执行结果Error上-气泡内容为空
https://www.tapd.cn/55049933/s/1351544

performance-test/backend/src/main/java/io/metersphere/base/mapper/ext/ExtTestPlanLoadCaseMapper.xml

@@ -150,7 +150,8 @@
         tplc.load_report_id,
         p.name as projectName,
         pv.name versionName,
-        lt.version_id versionId
+        lt.version_id versionId,
+        lt.description
         from test_plan_load_case tplc
         inner join load_test lt on tplc.load_case_id = lt.id
         left join user u on lt.user_id = u.id

performance-test/backend/src/main/java/io/metersphere/plan/dto/TestPlanLoadCaseDTO.java

@@ -22,6 +22,7 @@ public class TestPlanLoadCaseDTO extends TestPlanLoadCaseWithBLOBs {
     private String reportId;
     private String versionId;
     private String versionName;
+    private String description;
 
     @Getter
     @Setter