fix(接口定义): 修复接口定义case执行结果搜索未执行失败的缺陷

--bug=1015232 --user=王孝刚 【接口测试】编辑接口-case列表-执行结果筛选未执行失败
https://www.tapd.cn/55049933/s/1210646

frontend/src/business/components/api/definition/components/list/ApiCaseSimpleList.vue

@@ -744,6 +744,10 @@ export default {
       }
       this.initCondition();
       let isNext = false;
+      //导入的case执行结果默认为prepare，导致搜索未执行失败
+      if (this.condition.filters && this.condition.filters.exec_result && this.condition.filters.exec_result.indexOf('') !== -1) {
+        this.condition.filters.exec_result.push("Prepare")
+      }
       if (this.condition.projectId) {
         this.result = this.$post('/api/testcase/list/' + this.currentPage + "/" + this.pageSize, this.condition, response => {
           this.total = response.data.itemCount;