### 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
RS::GlobalShaderParameterType gvt = RS::get_singleton()->global_shader_parameter_get_type(p_variable);
	return (ShaderLanguage::DataType)RS::global_shader_uniform_type_get_shader_datatype(gvt);
}
static String complete_from_path;
static void _complete_include_paths_search(EditorFileSystemDirectory *p_efsd, List<ScriptLanguage::CodeCompletionOption> *r_options) {
	if (!p_efsd) {
		return;
	}
	for (int i = 0; i < p_efsd->get_file_count(); i++) {
		if (p_efsd->get_file_type(i) == SNAME("ShaderInclude")) {
			String path = p_efsd->get_file_path(i);
			if (path.begins_with(complete_from_path)) {
				path = path.replace_first(complete_from_path, "");
			}
			r_options->push_back(ScriptLanguage::CodeCompletionOption(path, ScriptLanguage::CODE_COMPLETION_KIND_FILE_PATH));
		}
	}
	for (int j = 0; j < p_efsd->get_subdir_count(); j++) {
		_complete_include_paths_search(p_efsd->get_subdir(j), r_options);
	}
}
static void _complete_include_paths(List<ScriptLanguage::CodeCompletionOption> *r_options) {