🧐[问题] 在ProTable 中的 valueType 是 select 支持 fieldNames 属性

提问前先看看：

https://github.com/ryanhanwu/How-To-Ask-Questions-The-Smart-Way/blob/main/README-zh_CN.md

### 🧐 问题描述

在 这种Tree 结构数据, 要修改fieldNames 有一点麻烦, 能不能支持一下 fieldNames

### 💻 示例代码

{
title: 'xx',
dataIndex: 'xx',
valueType: 'treeSelect',
// 支持fieldNames
request: async () => {
const {data} = await xx({specification: {}});
return data ?? [];
}
},

### 🚑 其他信息

Start by tracing how ProTable handles the `treeSelect` valueType and how its request data reaches the underlying selector. Compare that path with the fieldNames option described in the issue, then verify that tree-shaped data with custom field names is accepted and rendered correctly.

Written by the indexing model from the issue text.