[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

まず提案とリンクされている Microsoft の ARM64X ドキュメントを読み、次に CPython の Windows ビルドプロセスと既存の x64 および ARM64 の出力を調査します。CPython が ARM64X DLL を提供し、1 つの Windows インストールでネイティブ ARM64 アプリケーションと x64 エミュレーションアプリケーションの両方をサポートできれば完了です。