WPF support for ARM64: Update WPF Arcade SDK to support ARM64 #4034
Description
WPF ARM64 support requires updates to multiple repos: wpf-int, public WPF, WindowsDesktop, SDK, and Installer. These changes need to be staged in the following order: WPF Arcade SDK changes in the public repo, native components in the internal repo, public repo changes, WindowsDesktop, SDK, and then Installer changes.
The WPF Arcade SDK is consumed by the internal WPF repo and must go in prior to pushing the ARM64 port for WPF's native components to the internal WPF repo.