### 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
Ref<Shader> rel_shader = ResourceLoader::load(shader->get_path(), shader->get_class(), ResourceFormatLoader::CACHE_MODE_IGNORE);
	ERR_FAIL_COND(!rel_shader.is_valid());
	shader_editor->set_block_shader_changed(true);
	shader->set_code(rel_shader->get_code());
	shader_editor->set_block_shader_changed(false);
	shader->set_last_modified_time(rel_shader->get_last_modified_time());
	shader_editor->reload_text();
}
void TextShaderEditor::_reload_shader_include_from_disk() {
	Ref<ShaderInclude> rel_shader_include = ResourceLoader::load(shader_inc->get_path(), shader_inc->get_class(), ResourceFormatLoader::CACHE_MODE_IGNORE);
	ERR_FAIL_COND(!rel_shader_include.is_valid());
	shader_editor->set_block_shader_changed(true);
	shader_inc->set_code(rel_shader_include->get_code());
	shader_editor->set_block_shader_changed(false);
	shader_inc->set_last_modified_time(rel_shader_include->get_last_modified_time());
	shader_editor->reload_text();
}
void TextShaderEditor::_reload() {