Tree custom expand/collapse icon style problem

[johnnyhwa]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

3.1.0

Environment

OS: Win11; Browser: chrome：100.0.4896.88（正式版本） （64 位）; Vue: 3.2.11

Reproduction link

https://www.antdv.com/components/tree-cn

Steps to reproduce

1. 打开ant-design-vue 2.x版本文档
   https://2x.antdv.com/components/tree-cn，查看Tree组件，自定义展开/折叠图标示例，点击展开图标

2. 打开ant-design-vue 3.x版本文档
   https://www.antdv.com/components/tree-cn，查看Tree组件，自定义展开/折叠图标示例，点击展开图标

3. 比较展开树节点后，图标的样式表现

What is expected?

3.x版本的Tree组件表现与2.x版本一致，展开后Icon自动转向

What is actually happening?

3.x版本更新后，自定义展开/折叠图标在节点折叠后无相关样式联动

[tangjinzhou]

ref #5484

[github-actions]

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