GDScript: preloading a custom resource type has a return type of GDScript

[jtnicholl]

Godot version

v4.0.beta.custom_build [47ef054]

System information

Fedora 36

Issue description

Calling preload to load a resource of a custom resource type has a return type of GDScript instead of the custom resource type, causing an error if used with static typing.

Removing the static typing or switching to load can be used as a workaround.

Seems to be a regression from #69471, reverting it fixes the error.

Steps to reproduce

1. Define a custom resource in GDScript with a class name
2. Create an instance of it
3. Try to preload it for use in a statically typed variable or parameter

Minimal reproduction project

resource_preload.zip

[adamscott]

CC @rune-scape