[bug]InputTree 组件，设置addControls后，新增事件产生的数据缺少parent信息

[yanshuanghua]

描述问题：

InputTree 组件，设置addControls后，通过监听新增事件产生的数据缺少parent信息

截图或视频：

文档中示例是有parent信息的:https://aisuda.bce.baidu.com/amis/zh-CN/components/form/input-tree#addconfirm

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 最新版6.3.0

3. 粘贴有问题的完整 amis schema 代码： 增加addControls后，缺少parent信息，代码见下：

   {
   "type": "page",
   "body": {
   "type": "form",
   "api": "/amis/api/mock2/form/saveForm",
   "debug": true,
   "body": [
     {
       "type": "input-tree",
       "name": "tree",
       "label": "Tree",
       "creatable": true,
       "removable": true,
       "editable": true,
       "addApi": "/amis/api/mock2/form/saveForm",
       "addControls": [
         {
           "type": "text",
           "name": "label",
           "label": "选项标题"
         },
         {
           "type": "text",
           "name": "value",
           "label": "选项值"
         }
       ],
       "onEvent": {
         "addConfirm": {
           "actions": [
             {
               "actionType": "toast",
               "args": {
                 "msg": "${event.data.item|json}"
               }
             }
           ]
         }
       },
       "options": [
         {
           "label": "Folder A",
           "value": 1,
           "children": [
             {
               "label": "file A",
               "value": 2
             },
             {
               "label": "file B",
               "value": 3
             }
           ]
         },
         {
           "label": "file C",
           "value": 4
         },
         {
           "label": "file D",
           "value": 5
         }
       ]
     }
   ]
   }
   }

4. 操作步骤 请简单描述一下复现的操作步骤...

[yanshuanghua]

增加子节点时需要拿到父节点信息

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[yanshuanghua]

@2betop @nwind