### Godot version

4.0.3

### System information

Win7

### Issue description

#if and #else highlighted with the color same as if and else shader statement:

![image](https://github.com/godotengine/godot/assets/28286958/c2d58151-d6d2-4305-b4da-36e76e316caf)


### Steps to reproduce

1. Create shader
2. Add #if and #else

### Minimal reproduction project

N/A
return shader;
}
Ref<ShaderInclude> ShaderTextEditor::get_edited_shader_include() const {
	return shader_inc;
}
void ShaderTextEditor::set_edited_shader(const Ref<Shader> &p_shader) {
	set_edited_shader(p_shader, p_shader->get_code());
}
void ShaderTextEditor::set_edited_shader(const Ref<Shader> &p_shader, const String &p_code) {
	if (shader == p_shader) {
		return;
	}
	if (shader.is_valid()) {
		shader->disconnect(SNAME("changed"), callable_mp(this, &ShaderTextEditor::_shader_changed));
	}
	shader = p_shader;
	shader_inc = Ref<ShaderInclude>();
	set_edited_code(p_code);
	if (shader.is_valid()) {
		shader->connect(SNAME("changed"), callable_mp(this, &ShaderTextEditor::_shader_changed));
	}
}
void ShaderTextEditor::set_edited_shader_include(const Ref<ShaderInclude> &p_shader_inc) {