🐛[BUG]ProTable中form部分属性不生效

提问前先看看：

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

### 🐛 bug 描述
在ProTable中form属性中设置labelAlign和labelCol,如下：
`form={{ labelAlign: 'left', labelCol: { flex: '0' } }}`

`labelAlign: 'left'`有效果，label标题会居左。但 `labelCol: { flex: '0' }`没有效果。在Column中设置`formItemProps: { labelCol: { flex: 0 } },`才有效。

### 📷 复现步骤
1.在ProTable中form属性中设置labelAlign和labelCol,如下：
`form={{ labelAlign: 'left', labelCol: { flex: '0' } }}`

### 🏞 期望结果
label与warp之间没有间隔。

### © 版本信息

- ProComponents 版本:2.7.9

### 🚑 其他信息

Start at the ProTable form configuration entry point and reproduce the issue with form.labelAlign and form.labelCol on ProComponents 2.7.9. Compare the form-level labelCol behavior with Column.formItemProps.labelCol; done means the form-level setting removes the gap between the label and wrapper, with a regression test covering the reported configuration.

Written by the indexing model from the issue text.