input-table组件节点嵌套的children属性所属父节点上没有显示折叠按钮，折叠按钮显示在根节点了

#### 描述问题：

如题，希望改回amis 3.2那种效果，把折叠按钮显示在每个有children的节点上而不是只在根节点显示一个总的折叠按钮。

#### 截图或视频：


#### 如何复现（请务必完整填写下面内容）：

1. 你是如何使用 amis 的？
`sdk`

2. amis 版本是什么？请先在最新 beta 版本测试问题是否存在
3.6，6.0都有此问题，但是3.2是好的，希望改回成3.2的效果。

4. 粘贴有问题的完整 `amis schema` 代码：
```
{
"type": "page",
"body": {
"type": "form",
"data": {
"fields": [
{
"name": "客户",
"code": "account"
},
{
"type": "table",
"name": "问题",
"code": "project_issue",
"fields": [
{
"name": "提出",
"code": "project_issue_requester"
},
{
"name": "问题名称",
"code": "project_issue_name"
}
],
"children": [
{
"name": "提出",
"code": "project_issue_requester"
},
{
"name": "问题名称",
"code": "project_issue_name"
}
]
}
],
},
"api": "/amis/api/mock2/form/saveForm",
"body": [
{
"type": "input-table",
"label": false,
"name": "fields",
"draggable": true,
"showIndex": true,
"id": "steedos_input_table_fields_g8hwhrczm",
"columns": [
{
"type": "input-text",
"static": true,
"readonly": true,
"label": "Api 名称",
"name": "code"
},
{
"type": "input-text",
"static": true,
"readonly": true,
"label": "名称",
"name": "name"
}
]
}
]
}
}
```

5. 操作步骤
把上面的schema代码copy到官网示例 https://aisuda.bce.baidu.com/amis/zh-CN/components/form/input-table#%E6%98%BE%E7%A4%BA%E5%BA%8F%E5%8F%B7 中就能重现。

Start with the input-table example at the linked official documentation URL and reproduce the behavior using the supplied amis schema. Compare the nested-children collapse controls in amis 3.2 with versions 3.6 and 6.0. Done means each node containing children displays its own collapse button rather than only the root node displaying a single global button.

Written by the indexing model from the issue text.