### Godot version

0810ecaafdbee3ea747219e6ab3a8de5d2216a09

### System information

Windows 11, Nvidia 3000, firefox

### Issue description

Exporting the gltf file is corrupt in blender.

### Steps to reproduce

1. Open project.
2. Export as glb
3. Open in blender
4. Blender display many warnings

![image](https://user-images.githubusercontent.com/32321/216740742-de662c5c-f5c3-44b5-a36e-8ad33defdbba.png)


### Minimal reproduction project

https://cdn.discordapp.com/attachments/598003845657788438/1071249610896580691/Test_Game_Project.zip


GLTFNodeIndex p_root_node_index,
			Ref<GLTFNode> p_gltf_node, Ref<GLTFState> p_state);
#endif 
	void _convert_multi_mesh_instance_to_gltf(
			MultiMeshInstance3D *p_multi_mesh_instance,
			GLTFNodeIndex p_parent_node_index,
			GLTFNodeIndex p_root_node_index,
			Ref<GLTFNode> p_gltf_node, Ref<GLTFState> p_state);
	void _convert_skeleton_to_gltf(
			Skeleton3D *p_scene_parent, Ref<GLTFState> p_state,
			GLTFNodeIndex p_parent_node_index,
			GLTFNodeIndex p_root_node_index,
			Ref<GLTFNode> p_gltf_node);
	void _convert_bone_attachment_to_gltf(BoneAttachment3D *p_bone_attachment,
			Ref<GLTFState> p_state,
			GLTFNodeIndex p_parent_node_index,
			GLTFNodeIndex p_root_node_index,
			Ref<GLTFNode> p_gltf_node);
	void _convert_mesh_instance_to_gltf(MeshInstance3D *p_mesh_instance,
			Ref<GLTFState> p_state,
			Ref<GLTFNode> p_gltf_node);
	GLTFMeshIndex _convert_mesh_to_gltf(Ref<GLTFState> p_state,
			MeshInstance3D *p_mesh_instance);
	void _convert_animation(Ref<GLTFState> p_state, AnimationPlayer *p_animation_player,
			String p_animation_track_name);
	Error _serialize(Ref<GLTFState> p_state, const String &p_path);
	Error _parse(Ref<GLTFState> p_state, String p_path, Ref<FileAccess> p_file);
};
#endif