To implement windows-arm64 support, it is needed to add architecture as a subdirectory (https://github.com/flutter/flutter/issues/129805).

In short, when performing a flutter windows build, we have:
- Before: build/windows/runner/Release/gallery.exe
- After: build/windows/x64/runner/Release/gallery.exe

This convention follows what flutter linux build does.

Addresses: https://github.com/flutter/flutter/issues/129805
Addresses: https://github.com/flutter/flutter/issues/116196

Design doc: [flutter.dev/go/windows-arm64](https://flutter.dev/go/windows-arm64)

see [go/flutter-gar-reporting-q3-2023](http://go/flutter-gar-reporting-q3-2023)

The skeleton id needed to be updated to be sent to app store or play store

This app will be use for a11y assessments. See [design doc](http://go/flutter-gar-reporting-q3-2023)    (internal only)