🧐[问题]StepsForm中的下一步按钮如何控制只校验当前StepForm部分必填字段

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

StepsForm中的下一步按钮当前默认是调用 props.onSubmit() 方法，但实际会校验当前 StepForm 全部必填字段，业务需要涉及在三四层嵌套的 Form.List 中仅校验部分选中项必填字段。

### 💻 示例代码
submitter={{
render: (props) => {
if (props.step === 0) {
return (
props.onSubmit?.()}>
去第二步 {'>'}

);
}
}}

### 🚑 其他信息

Start at StepsForm's submitter render and the props.onSubmit() path shown in the issue, then trace how validation reaches nested Form.List fields. Compare the current whole-step validation with the requested behavior for selected required fields. Done means the next-step action validates only the intended fields while preserving normal step progression.

Written by the indexing model from the issue text.