👑 [需求] ProTable 的 LighterFilter 模式下，LightSelect 组件支持搜索时请求网络数据

提问前先看看：

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

### 🔩 所属模块或组件

pro-field ==> LightSelect

### 🥰 需求描述

ProTable 的 LighterFilter 模式下，LightSelect 组件支持搜索时请求网络数据

LightSelect 支持类似 SearchSelect 的 fetchDataOnSearch 功能

https://github.com/ant-design/pro-components/blob/8d3cd04eb581c6e03b31e79998c7df7556ed3471/packages/field/src/components/Select/SearchSelect/index.tsx#L230

### ⛰ 功能需求适用场景

开启 filterType: "light" 后搜索不再请求网络数据

### 🧐 解决方案

参照 SearchSelect 改一下。

### 🚑 其他信息

Start with packages/field/src/components/Select/SearchSelect/index.tsx at the referenced fetchDataOnSearch implementation, then compare its behavior with pro-field's LightSelect used by ProTable's LighterFilter mode. Done means LightSelect can request network data while searching in filterType: "light", with behavior matching SearchSelect.

Written by the indexing model from the issue text.