[glTF] Wrong object mesh when two objects have a same name without an import hint

[passivestar]

Tested versions

v4.3.beta1.official [a4f2ea9]

System information

Godot v4.3.beta1 - macOS 14.4.1 - Vulkan (Forward+) - integrated Apple M1 Max - Apple M1 Max (10 Threads)

Issue description

Having two objects named Cube and Cube-col breaks the import:

Screen.Recording.mp4

Steps to reproduce

1. Make a blend file with a Cube in it
2. Export gltf and add it to scene in godot
3. Change the cube geometry, and add a -col hint to it to make it Cube-col. Export and reimport in godot
4. Add a new cube. It will get a name Cube
5. When you reimport the scene in godot you'll see that both cubes are using the mesh of the first cube

Minimal reproduction project (MRP)

MRP_gltf_duplicate.zip

[passivestar]

@AThousandShips In #72483 @rburing says that -col suffix specifically isn't removed if it would result in a name collision which I can confirm:

So it seems like this is a separate issue because this one isn't about a name collision but about broken import despite there not being any name collision after import is done (And also #72483 doesn't have any mention of wrong meshes being displayed in the viewport)

Also more info:

I just noticed that restarting the editor fixes this issue (even though clicking "Reimport" on gltf doesn't), which makes the MRP that I attached useless, you can only reproduce this by following the steps