Can't preload a scene in autoload if that scene uses the autoload

[KoBeWi]

Godot version

4.0 beta4

System information

Windows 10 x64

Issue description

When you have an Autoload and do preload("scene.tscn"), it will fail at runtime if that scene refers to Autoload in a script. This wasn't happening in beta3.

Steps to reproduce

Just run MRP

Minimal reproduction project

PreloadBug.zip

[adamscott]

I confirm the issue.

I tried to revert #68040 (26f0afd), to see if it was the cause, and it is not.

[adamscott]

I mentioned in #67714 that it fixes this PR, but ideally, we should find what caused this issue.

[KoBeWi]

Bisect says #67849 :<

tbh that fix was fishy to me from the beginning. But the issue it fixed was more important, so we need a proper fix for both issues rather than simple revert.