sd1840888

[Unity] Bug: Wrapper Vector3、Camera、Transform并开启unsafe编译后 使用Camera.WorldToScreenPoint进行坐标转换仍会产生GC

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### 前置阅读 | Pre-reading - [X] [文档](https://puerts.github.io/unity/zhcn/readme)/[Doc](https://puerts.github.io/unity/en/readme) - [X] [Issues](https://github.com/Tencent/puerts/issues?q=is%3Aissue+sort%3Aupdated-desc+is%3Aclosed) - [X] [FAQ](https://github.com/Tencent/puerts/blob/master/doc/unity/zhcn/faq.md) ### Puer的版本 | Puer Version 2.0 ### Unity的版本 | Unity Version 2021.3.29f ### 发生在哪个平台 | Platform win...