feat:优化设备按产品搜索清除条件的问题

src/views/iot/device/instance/index.vue

@@ -10,7 +10,7 @@
 <!--            <el-input v-model="tableData.param.key" placeholder="请输入设备标识" clearable style="width: 150px" @keyup.enter.native="typeList" />-->
 <!--          </el-form-item>-->
           <el-form-item label="所属产品" prop="productKey">
-            <el-select v-model="tableData.param.productKey" style="width: 140px" filterable placeholder="选择产品">
+            <el-select v-model="tableData.param.productKey" style="width: 140px" filterable clearable placeholder="选择产品">
               <el-option v-for="item in productData" :key="item.key" :label="item.name" :value="item.key" value-key="id"> </el-option>
             </el-select>
           </el-form-item>