fix(测试跟踪): 系统字段更改后用例新增保存的问题

--bug=1015795 --user=宋昌昌 【测试跟踪】用例状态的值改成自定义值后，新建用例，第一次保存状态失败 https://www.tapd.cn/55049933/s/1223713

backend/src/main/java/io/metersphere/track/service/TestCaseService.java

@@ -215,7 +215,6 @@ public class TestCaseService {
             request.setCustomNum(request.getNum().toString());
         }
         request.setReviewStatus(TestCaseReviewStatus.Prepare.name());
-        request.setStatus(TestCaseReviewStatus.Prepare.name());
         request.setDemandId(request.getDemandId());
         request.setDemandName(request.getDemandName());
         request.setCreateUser(SessionUtils.getUserId());