[API Compatibility No.31-33] Sink asinh, atan and atan2 to cpp

[Manfredss]

Sink asinh, atan to cpp, add param decorator to atan2

[paddle-bot]

感谢你贡献飞桨文档，文档预览构建中，Docs-New 跑完后即可预览，预览链接：http://preview-pr-7668.paddle-docs-preview.paddlepaddle.org.cn/documentation/docs/zh/api/index_cn.html
预览工具的更多说明，请参考：飞桨文档预览工具

[github-actions]

📚 本次 PR 文档预览链接（点击展开）

ℹ️ 预览提醒 请等待 Docs-NEW 流水线运行完成后再点击预览链接，否则可能会看到旧版本内容或遇到链接无法访问的情况。

• docs/api/paddle/asinh_cn.rst: 点击预览
• docs/api/paddle/atan2_cn.rst: 点击预览
• docs/api/paddle/atan_cn.rst: 点击预览

[Copilot]

Pull request overview

This PR adds API compatibility by introducing an optional out parameter to three mathematical functions (asinh, atan, and atan2) in their Chinese documentation. The out parameter is added as a keyword-only argument with a default value of None.

Key Changes:

• Added out parameter to function signatures of asinh, atan, and atan2
• Updated parameter documentation sections to describe the new out parameter
• Modified data type descriptions for asinh to include additional types (float16, bfloat16)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
docs/api/paddle/atan_cn.rst	Added out parameter to function signature and parameter documentation
docs/api/paddle/atan2_cn.rst	Added out parameter to function signature and parameter documentation
docs/api/paddle/asinh_cn.rst	Added out parameter and updated data type list (incomplete)
docs/api/paddle/asin_cn.rst	Contains unresolved merge conflict markers from another change

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

The parameter description for x is incomplete. The line ends with a comma and the list of data types is not finished. This should include the complete list of supported data types.

Suggested change

	- **x** (Tensor) - 输入的 Tensor，数据类型为： float32, float64, float16, bfloat16,
	- **x** (Tensor) - 输入的 Tensor，数据类型为：float32、float64、float16、bfloat16、complex64、complex128。