### Godot version

4.1.3

### System information

Linux

### Issue description

I'm trying to make an editor plugin on Rust:

```rust
#[derive(GodotClass)]
#[class(tool, editor_plugin, init, base=EditorPlugin)]
pub struct MyEditorPluginBase {}
```

But due to some limitations, I still have to use GDScript for some specific things.

So I tried to make a subclass of this Rust class:

```gdscript
@tool
class_name MyEditorPlugin
extends MyEditorPluginBase
```

This would work if `MyEditorPluginBase` was a GDScript class, but since it's a GDExtension class in my case, it doesn't work:

> Unable to load addon script from path: 'res://addons/my_addon/my_editor_plugin.gd' Base type is not EditorPlugin.

But it obviously **IS** EditorPlugin!

![godot-editorplugin-docs](https://github.com/godotengine/godot/assets/3236464/4665deeb-30f0-45cd-bfff-56101b9d4875)

![godot-editorplugin](https://github.com/godotengine/godot/assets/3236464/b1b6ecb4-de22-4abd-91a3-e180691f67ee)

If I understand correctly, this behavior is caused by this function, which checks some mysterious "instance base type" instead of real inheritance:

https://github.com/godotengine/godot/blob/fa4a65387ea41506ecc519fc61a06da110dce51c/editor/editor_node.cpp#L3456-L3458

https://github.com/godotengine/godot/blob/fa4a65387ea41506ecc519fc61a06da110dce51c/modules/gdscript/gdscript.cpp#L260-L263

Since the [documentation](https://docs.godotengine.org/en/stable/tutorials/plugins/editor/making_plugins.html#the-script-file) doesn't say that the script must be a **direct** subclass of EditorPlugin (and an indirect subclass works fine in GDScript), I interpret this behavior as a Godot bug.

### Steps to reproduce

See above

### Minimal reproduction project

[gdext_editor_plugin_test.zip](https://github.com/godotengine/godot/files/13451014/gdext_editor_plugin_test.zip)
}
					
					for (KeyValue<Node *, Node *> &E : additive_node_entry.ownership_table) {
						Node *current_ancestor = E.key;
						Node *ancestor_owner = E.value;
						if (ancestor_owner == original_node) {
							ancestor_owner = instantiated_node;
						}
						current_ancestor->set_owner(ancestor_owner);
					}
				}
				
				if (selected_node_paths.size()) {
					for (NodePath selected_node_path : selected_node_paths) {
						Node *selected_node = instantiated_node->get_node_or_null(selected_node_path);
						if (selected_node) {
							editor_selection->add_node(selected_node);
						}
					}
					editor_selection->update();
				}
				
				for (KeyValue<NodePath, ModificationNodeEntry> &E : modification_table) {
					NodePath new_current_path = E.key;
					Node *modifiable_node = instantiated_node->get_node_or_null(new_current_path);
					if (modifiable_node) {
						
						List<PropertyInfo> pinfo;
						modifiable_node->get_property_list(&pinfo);