refactor(接口定义): 优化导出报告的显示

--bug=1019808 --user=王孝刚 【接口测试】接口场景的测试报告导出pdf显示中文和页面显示样式调整
https://www.tapd.cn/55049933/s/1303510

api-test/frontend/src/business/automation/report/ApiReportExport.vue

@@ -51,11 +51,11 @@
               {{ request.passAssertions + ' / ' + request.totalAssertions }}
             </api-report-request-header-item>
 
-            <api-report-request-header-item :title="$t('api_report.response_code')">
+            <api-report-request-header-item :title="$t('api_report.response_code')" style="width: 300px">
               {{ request.responseResult.responseCode }}
             </api-report-request-header-item>
 
-            <api-report-request-header-item :title="$t('api_report.result')">
+            <api-report-request-header-item :title="$t('api_report.result')" style="width: 50px">
               <el-tag v-if="request.unexecute">{{ $t('api_test.home_page.detail_card.unexecute') }} </el-tag>
               <el-tag v-else-if="!request.success && request.status && request.status === 'PENDING'"
                 >{{ $t('api_test.home_page.detail_card.unexecute') }}