fix(接口定义): 修复接口定义保存报错的缺陷 (#18257)

--bug=1017298 --user=王孝刚 【接口测试】【特殊数据】编辑接口定义报错了
https://www.tapd.cn/55049933/s/1252043

Co-authored-by: wxg0103 <727495428@qq.com>

backend/src/main/java/io/metersphere/api/service/ApiTestCaseService.java

@@ -867,6 +867,9 @@ public class ApiTestCaseService {
             apiDefinitionExample.createCriteria().andApiDefinitionIdIn(ids);
             List<ApiTestCaseWithBLOBs> caseWithBLOBs = apiTestCaseMapper.selectByExampleWithBLOBs(apiDefinitionExample);
             List<String> caseIds = caseWithBLOBs.stream().map(ApiTestCaseWithBLOBs::getId).collect(Collectors.toList());
+            if (CollectionUtils.isEmpty(caseIds)) {
+                return;
+            }
             List<ApiTestCaseWithBLOBs> bloBs = extApiTestCaseMapper.unTrashCaseListByIds(caseIds);
 
             SqlSession sqlSession = sqlSessionFactory.openSession(ExecutorType.BATCH);