Enable LLVM + AOT for the release build for devices

[steveisok]

The default release build for devices is going to be LLVM + AOT. We need to modify the build to make this happen:

• Modify the android & iOS store publish to enable LLVM + AOT for devices.
• Ensure the right files sit next to mono-aot-cross Build iOS AOT compiler against LLVM, always #35306
• Validate a simple sample works

[ghost]

Tagging @directhex as an area owner

[ViktorHofer]

Not relevant anymore, closing.