Cannot export to x86_64 and Apple Silicon for iOS project (to run in simulator)

[atonamy]

Godot version:
3.3

OS/device including version:
Iphone 11 pro (simulator)

Issue description:
When I export iOS project with GdNative I'm unable to select x86_64 and Apple Silicon target to run it in simulator. And final project exported as MyProjectName.a (and it's only arm architecture support)

Steps to reproduce:
Add gdnative libs for x86_64 and arm64 for iOS then click Project menu then export you will see no x86_64 or Apple Silicon (simulator) option architecture export.

Minimal reproduction project:
Use this example to replicate the issue https://github.com/godot-rust/godot-rust/tree/master/examples/spinning_cube

[Calinou]

cc @bruvzg

[bruvzg]

Should be fixed by #49248

[atonamy]

@bruvzg so I have to compile Godot from source of 3.x branch to test the fix?