PointerOffset test case is falling on Linux platform with release configuration

[Kyle-Ye]

https://github.com/OpenSwiftUIProject/OpenGraph/actions/runs/8956722856/job/24601125016

[Kyle-Ye]

Traced upstream by swiftlang/swift-testing#398

A temporary solution: #74

[Kyle-Ye]

Update: invalidScenePointer is considered to be UB. Use pointer(to:) instead.

File an AG issue for FB13782419

[Kyle-Ye]

Update: invalidScenePointer will always return 0x1 on macOS 15 beta 1.

[Kyle-Ye]

Update: invalidScenePointer will always return 0x1 on macOS 15. And the UB issue is fixed on Swift 6 toolchain's Swift Testing.