[Windows] Enable ARM64X build

Feature or enhancement

Proposal:

Currently, CPython offers separate x64 and ARM64 builds for Windows. This poses a challenge that users will need both installed in order for apps using x64 emulation and native ARM64 apps to use the Python interpreter.
This proposal suggests providing ARM64X (which is combined ARM64 native + ARM64EC) DLLs for CPython, allowing both native ARM64 apps and x64 emulated apps to use a single Python install.
Windows versions that do not provide native x64 emulation (Windows 10) will simply use the ARM64 binary within ARM64X, so there is no change to current behavior on those systems.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

首先阅读提案和链接的 Microsoft ARM64X 文档，然后检查 CPython 的 Windows 构建流程及其现有的 x64 和 ARM64 输出。当 CPython 提供 ARM64X DLL，使一个 Windows 安装同时支持原生 ARM64 应用程序和 x64 模拟应用程序时，即表示完成。