🐛[BUG] ProForm.Item组件中使用Input，无法通过form.getFieldValue("name")获取value值，显示undefined

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
``组件中使用``，无法通过`form.getFieldValue("name")`获取value值。但是使用``组件就能正常获取数值

### 📷 复现步骤
```
//1.获取from表单
const [form] = Form.useForm()
//2.获取name="AAA"的值
form.getFieldValue('AAA')

```

### 🏞 期望结果

希望form.getFieldValue('AAA')能够获取到用户输入的正常数值。
### 💻 复现代码

### © 版本信息

- ProComponents 版本: [e.g. 4.0.0]
- umi 版本
- 浏览器环境
- 开发环境 [e.g. mac OS]

### 🚑 其他信息

Start with the provided ProForm.Item reproduction using Input and form.getFieldValue('AAA'); inspect the ProForm form-field integration and compare it with ProFormText. Done means user input is returned by form.getFieldValue for the named field and the reproduction is covered by a regression test.

Written by the indexing model from the issue text.