Support native ARM64 MSVC toolchain

[Alovchin91]

In VS 17.3 a native ARM64 MSVC toolchain has appeared. Generally it should be chosen over the emulated one.

Open questions:

• [ ] Did it actually appear in VS 17.2?
• [ ] Does it contain all the tools?
• [ ] If not, should we try several toolchains? Or is it okay if it's not complete in older, unsupported versions of VS 2022?

[ChrisDenton]

This code will need formatting and the MSRV issues fixed.

More importantly this will need some testing. Ideally we should also have Windows ARM running in CI.

[briansmith]

@Alovchin91 Are you interested in rebasing this and pushing it so we can see the CI run results again?

[Alovchin91]

@briansmith Sure, will be back at my laptop in a couple hours 👍

[Alovchin91]

@briansmith Done

[dpaoliello]

@Alovchin91 are you still working on this, or would you like me to take over?

To answer your questions:

• 17.4 is the first VS with support for ARM64: https://devblogs.microsoft.com/visualstudio/arm64-visual-studio-is-officially-here/
• The "Desktop development with C++" and ".NET Desktop development" workloads are both supported, which includes cl.exe, link.exe, msbuild.exe and the Windows SDK.
• For now, I don't believe that we should drop support for using x86 on ARM64, given that VS has no way to migrate across architectures other than re-installing.

One interesting thing we may want to do: on Windows 11 we should prefer the x64 host architecture to x86 since it should be faster.

[Alovchin91]

Hi @dpaoliello, I don't currently actively work on it, so if you'd prefer to take it over, please go ahead ☺️ Otherwise I will pick it up at some point but without any concrete promises about the timeframe.

[NobodyXu]

Close as #957 supersedes this and is already merged