style(接口测试): 优化任务中心场景报告显示样式

--bug=1020475 --user=王孝刚 【任务中心】任务中心-场景报告-显示优化
https://www.tapd.cn/55049933/s/1308701

frontend/src/business/components/api/automation/report/components/MetricChart.vue

@@ -65,6 +65,7 @@
       <div class="split"></div>
       <!-- 场景统计 -->
       <div style="width: 50%">
+        <el-row type="flex" justify="center" align="middle">
         <el-row type="flex" justify="center" align="middle" v-if="report.reportType !== 'API_INTEGRATED'">
           <div class="metric-box">
             <div class="value">{{ content.scenarioTotal ? content.scenarioTotal : 0 }}</div>
@@ -92,6 +93,7 @@
             <div class="name">{{ $t('api_test.home_page.detail_card.unexecute') }}</div>
           </div>
         </el-row>
+        </el-row>
         <el-divider v-if="report.reportType !== 'API_INTEGRATED'"/>
         <el-row type="flex" justify="center" align="middle">
           <el-row type="flex" justify="center" align="middle">