fix(接口测试): 修复断言步骤内容不支持鼠标滑动全选问题

--bug=1013062 --user=赵勇 [接口测试] github#12290断言文字不能全选 https://www.tapd.cn/55049933/s/1156233

frontend/src/business/components/api/definition/components/assertion/ApiAssertions.vue

@@ -1,5 +1,5 @@
 <template>
-  <el-card>
+  <el-card :draggable="true">
     <el-row>
       <span>{{ $t('api_test.request.assertions.description') }}</span>
       <span style="float: right">
@@ -14,7 +14,8 @@
     <div class="assertion-add" :draggable="draggable">
       <el-row :gutter="10">
         <el-col :span="4">
-          <el-select :disabled="isReadOnly" class="assertion-item" v-model="type" :placeholder="$t('api_test.request.assertions.select_type')" size="small">
+          <el-select :disabled="isReadOnly" class="assertion-item" v-model="type"
+                     :placeholder="$t('api_test.request.assertions.select_type')" size="small">
             <el-option :label="$t('api_test.request.assertions.text')" :value="options.TEXT"/>
             <el-option :label="$t('api_test.request.assertions.regex')" :value="options.REGEX"/>
             <el-option :label="'JSONPath'" :value="options.JSON_PATH"/>

frontend/src/business/components/api/definition/components/step/JmxStep.vue

@@ -89,6 +89,7 @@
              :response="response"
              :is-read-only="data.disabled"
              :extract="data"
+             :draggable="true"
              @copyRow="copyRow"
              @remove="remove"
              v-if="data.type==='Extract'"
@@ -104,6 +105,7 @@
             :response="response"
             :request="request"
             :apiId="apiId"
+            :draggable="true"
             :is-read-only="data.disabled"
             :assertions="data"/>
          </div>