### 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


if (!p_state->json.has("textures")) {
		return OK;
	}
	const Array &textures = p_state->json["textures"];
	for (GLTFTextureIndex i = 0; i < textures.size(); i++) {
		const Dictionary &d = textures[i];
		ERR_FAIL_COND_V(!d.has("source"), ERR_PARSE_ERROR);
		Ref<GLTFTexture> t;
		t.instantiate();
		t->set_src_image(d["source"]);
		if (d.has("sampler")) {
			t->set_sampler(d["sampler"]);
		} else {
			t->set_sampler(-1);
		}
		p_state->textures.push_back(t);
	}
	return OK;
}
GLTFTextureIndex GLTFDocument::_set_texture(Ref<GLTFState> p_state, Ref<Texture2D> p_texture, StandardMaterial3D::TextureFilter p_filter_mode, bool p_repeats) {