ARM64 version of uvatlastool

[walbourn]

The VC++ projects only currently build x86/x64 versions of this tool for desktop.

The CMakeLists.txt supports creating the ARM64 version of this tool, so this should be added to the VC++ projects.

[walbourn]

Should include the ARM64 built & codesigned version in the release, along with updating the vcpkg port to download it when appropriate.

[walbourn]

This will probably be easier to implement when I drop support for Windows 7 & Windows 8.x for the uvatlastool since otherwise this hits some NuGet packages.config quirks.