### 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


Array nodes;
	for (int i = 0; i < p_state->nodes.size(); i++) {
		Dictionary node;
		Ref<GLTFNode> gltf_node = p_state->nodes[i];
		Dictionary extensions;
		node["extensions"] = extensions;
		if (!gltf_node->get_name().is_empty()) {
			node["name"] = gltf_node->get_name();
		}
		if (gltf_node->camera != -1) {
			node["camera"] = gltf_node->camera;
		}
		if (gltf_node->light != -1) {
			Dictionary lights_punctual;
			extensions["KHR_lights_punctual"] = lights_punctual;
			lights_punctual["light"] = gltf_node->light;
		}
		if (gltf_node->mesh != -1) {
			node["mesh"] = gltf_node->mesh;
		}
		if (gltf_node->skin != -1) {
			node["skin"] = gltf_node->skin;
		}
		if (gltf_node->skeleton != -1 && gltf_node->skin < 0) {
		}
		if (gltf_node->xform != Transform3D()) {