### Godot version

4.2.dev 5ee983188de97ae027f9b9c1443438063f708a7e

### System information

Windows 10 - Compatibility renderer 

### Issue description

When running a VR project sky contribution is not working in the compatibility renderer:

![image](https://github.com/godotengine/godot/assets/1945449/7aa19569-95c8-41a2-913b-37b81f4728a7)

It is working fine in normal mode. Can be worked around by setting sky contribution to 0 and providing an ambient color.

### Steps to reproduce

Try any project with a proper sky setup in XR, just switch to compatibility renderer.

### Minimal reproduction project

I'll try and create an MVP soon that can be used without XR hardware, but for now this can be used:
https://github.com/BastiaanOlij/godot_openxr_demo
material_data = nullptr;
		}
	}
	if (material_data) {
		if (ginstance->data->dirty_dependencies) {
			material_storage->material_update_dependency(m_src, &ginstance->data->dependency_tracker);
		}
	} else {
		material_data = static_cast<GLES3::SceneMaterialData *>(material_storage->material_get_data(scene_globals.default_material, RS::SHADER_SPATIAL));
		m_src = scene_globals.default_material;
	}
	ERR_FAIL_NULL(material_data);
	_geometry_instance_add_surface_with_material_chain(ginstance, p_surface, material_data, m_src, p_mesh);
	if (ginstance->data->material_overlay.is_valid()) {
		m_src = ginstance->data->material_overlay;
		material_data = static_cast<GLES3::SceneMaterialData *>(material_storage->material_get_data(m_src, RS::SHADER_SPATIAL));
		if (material_data && material_data->shader_data->valid) {
			if (ginstance->data->dirty_dependencies) {
				material_storage->material_update_dependency(m_src, &ginstance->data->dependency_tracker);
			}
			_geometry_instance_add_surface_with_material_chain(ginstance, p_surface, material_data, m_src, p_mesh);
		}
	}
}
void RasterizerSceneGLES3::_geometry_instance_update(RenderGeometryInstance *p_geometry_instance) {
	GLES3::MeshStorage *mesh_storage = GLES3::MeshStorage::get_singleton();
	GLES3::ParticlesStorage *particles_storage = GLES3::ParticlesStorage::get_singleton();
	GeometryInstanceGLES3 *ginstance = static_cast<GeometryInstanceGLES3 *>(p_geometry_instance);
	if (ginstance->data->dirty_dependencies) {
		ginstance->data->dependency_tracker.update_begin();