Add arm64 cross-arch msi installers (#67066)

Author: jkoritzinsky

src/installer/pkg/sfx/Microsoft.NETCore.App/Microsoft.NETCore.App.Host.sfxproj

@@ -16,7 +16,7 @@
     C++/CLI project system support.
   -->
   <ItemGroup>
-    <CrossArchSdkMsiInstallerArch Include="x86;x64" />
+    <CrossArchSdkMsiInstallerArch Include="x86;x64;arm64" />
   </ItemGroup>
 
   <ItemGroup>