fix(用例管理): 用例保存并继续后未清空标签&步骤内容

--bug=1036080 --user=王旭 【用例管理】功能用例-创建用例-保存并继续创建后未清空内容 https://www.tapd.cn/55049933/s/1479968

frontend/src/views/case-management/caseManagementFeature/components/caseTemplateDetail.vue

@@ -753,6 +753,16 @@
       };
     });
     fileList.value = [];
+    form.value.tags = [];
+    stepData.value = [
+      {
+        id: getGenerateId(),
+        step: '',
+        expected: '',
+        showStep: false,
+        showExpected: false,
+      },
+    ];
     caseFormRef.value?.resetFields();
   }