### 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
lightmap_instance = p_lightmap_instance;
	lightmap_uv_scale = p_lightmap_uv_scale;
	lightmap_slice_index = p_lightmap_slice_index;
	_mark_dirty();
}
void RasterizerSceneGLES3::GeometryInstanceGLES3::set_lightmap_capture(const Color *p_sh9) {
	if (p_sh9) {
		if (lightmap_sh == nullptr) {
			lightmap_sh = memnew(GeometryInstanceLightmapSH);
		}
		memcpy(lightmap_sh->sh, p_sh9, sizeof(Color) * 9);
	} else {
		if (lightmap_sh != nullptr) {
			memdelete(lightmap_sh);
			lightmap_sh = nullptr;
		}
	}
	_mark_dirty();
}
void RasterizerSceneGLES3::_update_dirty_geometry_instances() {