🐛 [BUG]ProTable使用树结构数据，嵌套子表格式错误

### 🐛 bug 描述

ProTable使用树结构数据，嵌套子表，页面错乱，会生成空白tr和td。
即使在expandedRowRender中返回了undefined，也会生成空白表格，页面会有占位。
expandable={{
expandedRowRender: undefined
}}这样写是没问题的


### 📷 复现步骤 | Recurrence steps

const subTableRender = (record: Module) => {
if(record.type ==='1'){
return (
{
return await search({...params, pid: record.id, sort: 'desc', filter: 'order_num'});
}
}
pagination={false}
headerTitle={false}
search={false}
options={false}
/>
);
}
return undefined;
}

headerTitle="模块列表"
rowKey="id"
columns={columns}
search={{
labelWidth: 'auto',
}}
actionRef={actionRef}
pagination={{
onChange: (page) => setCurrentPage(page)
}}
request={
async (params: ModuleSearch) => {
return await search({...params, pid: pid, sort: 'desc', filter: 'order_num'});
}
}
rowSelection={{
onChange: (_, selectedRows) => {
setSelectedRows(selectedRows);
}
}}
expandable={{
expandedRowRender: subTableRender
}}
toolBarRender={
() => [
{
setShowAdd(true);
}}>
新建

]
}
/>

### 🏞 期望结果 | Expected results

若返回undefined，不应生成dom数据。

### 💻 复现代码 | Recurrence code

### © 版本信息

- Ant Design Pro 版本: [e.g. 4.0.0]
- umi 版本
- 浏览器环境
- 开发环境 [e.g. mac OS]

### 🚑 其他信息

Start by reproducing the issue with the provided TypeScript ProTable tree-data example and inspect the expandable-row rendering path. Verify the behavior when expandedRowRender returns undefined; done means no blank tr or td is generated and the nested table still renders correctly for records of type '1'.

Written by the indexing model from the issue text.