fix(UI自动化): 测试计划执行场景提示文案

--bug=1016787 --user=张大海 【测试跟踪】测试计划-UI测试用例-操作-执行无提示 https://www.tapd.cn/55049933/s/1246482

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

@@ -1,5 +1,5 @@
 <template>
-  <ms-container v-loading="loading">
+  <ms-container v-loading="loading" :element-loading-text="$t('commons.executing')">
     <ms-main-container class="api-report-content">
       <el-card class="report-body">
         <section class="report-container" v-if="this.report.testId">