NativeAOT: investigate whether setting IlcKeepManagedDebuggerSupport is still needed

Check if this is needed:

[`fb1f26b` (#17374)](https://github.com/xamarin/xamarin-macios/pull/17374/commits/fb1f26b58144fb57eeb8c842f6c578187b05e5fe)

after:

https://github.com/dotnet/runtime/commit/652433bfe9858f7f4d6f6ffcf0c994cb9b91e482

Ref: https://github.com/xamarin/xamarin-macios/pull/17374#discussion_r1235547251