flex组件的gap参数是否可以接受column和row两个方向的值

- [ ] I have searched the [issues](https://github.com/vueComponent/ant-design-vue/issues)         of this repository and believe that this is not a duplicate.
        
        
### What problem does this feature solve?
可以控制横向和纵向两个方向的gap。目前传number只能设置一个值。换行后想单独控制行间距控制不了。

### What does the proposed API look like?
antdv 4.2.3