style(性能测试): 优化性能测试报告中环境的展示效果

--bug=1028215 --user=宋天阳 【性能测试】-报告的运行环境弹窗内容显示有点挤，建议增加行高
https://www.tapd.cn/55049933/s/1401694

performance-test/frontend/src/business/report/components/ProjectEnvironmentDialog.vue

@@ -9,7 +9,7 @@
       :before-close="handleClose">
     <div>
       <div v-if="projectEnvMap" type="flex">
-        <div v-for="(values,key) in projectEnvMap" :key="key" style="margin-right: 10px">
+        <div v-for="(values,key) in projectEnvMap" :key="key" style="margin-right: 10px;margin-bottom: 10px">
           {{ key + ":" }}
           <ms-tag v-for="(item,index) in values" :key="index" type="success" :content="item"
                   style="margin-left: 2px"/>

performance-test/frontend/src/business/test/components/PerformancePressureConfig.vue

@@ -1,5 +1,5 @@
 <template>
-  <div v-loading="result.loading" class="pressure-config-container">
+  <div v-loading="result.loading" v-if="threadGroups.length > 0" class="pressure-config-container">
     <el-row>
       <el-col>
         <el-form :inline="true" :disabled="isReadOnly">