_PyErr_ChainExceptions1 no longer avallable to extension modules in Python 3.13 alpha headers

Bug report

Bug description:

The API _PyErr_ChainExceptions1 has been removed from public headers as part of this change in Python 3.13 alpha. It is the only C API available to chain exceptions replacing _PyErr_ChainExceptions. That change was publicly documented in the 3.12 whatsnew.

In my extemsion module I use _PyErr_ChainExceptions for exception chaining for Python <= 3.11 from PEP 490 and _PyErr_ChainExceptions1for 3.12+.

Please provide an approved way for C extensions to continue to chain exceptions. The function is still present and I can duplicate the prototype for all to continue working, but that is not a desirable solution.

CPython versions tested on:

3.13

Operating systems tested on:

Linux

Linked PRs

• gh-116900

從 issue 106320 中引用的 Python 3.13 alpha 變更以及連結的 PR gh-116900 開始，接著檢視公開 C API 如何在 Python 3.11–3.13 中公開例外鏈。完成的標準是：在不重複私有原型的情況下，為 extension modules 串接例外建立一種經過核准的方式。