### Godot version

4.0 beta (e1648b3327431a09cc9498663fac483275eb711d)

### System information

Mageia 9, Linux

### Issue description

When exporting a project with no attached script (or with only a builtin GDScript), the following error is printed:
```
ERROR: Can't open file from path 'res://.godot/global_script_class_cache.cfg'.
   at: get_file_as_bytes (core/io/file_access.cpp:699)
```

And while the export succeeds, when running the project, it prints:
```
ERROR: Couldn't find the given section "" and key "list", and no default was given.
   at: get_value (core/io/config_file.cpp:86)
```

We should ensure that this file is always created, regardless of whether there are scripts to parse for class names or not. It should always contain at least `list=[]`.

### Steps to reproduce

- Create new project
- Create main scene with no script
- Export

### Minimal reproduction project

[NewProj.zip](https://github.com/godotengine/godot/files/10547125/NewProj.zip)
for (int i = 0; i < p_custom_features.size(); i++) {
		if (i > 0) {
			save_features += ",";
		}
		String f = p_custom_features[i].strip_edges().replace("\"", "");
		save_features += f;
	}
	if (p_path.ends_with(".godot") || p_path.ends_with("override.cfg")) {
		return _save_settings_text(p_path, save_props, p_custom, save_features);
	} else if (p_path.ends_with(".binary")) {
		return _save_settings_binary(p_path, save_props, p_custom, save_features);
	} else {
		ERR_FAIL_V_MSG(ERR_FILE_UNRECOGNIZED, "Unknown config file format: " + p_path + ".");
	}
}
Variant _GLOBAL_DEF(const String &p_var, const Variant &p_default, bool p_restart_if_changed, bool p_ignore_value_in_docs, bool p_basic, bool p_internal) {
	Variant ret;
	if (!ProjectSettings::get_singleton()->has_setting(p_var)) {
		ProjectSettings::get_singleton()->set(p_var, p_default);
	}
	ret = GLOBAL_GET(p_var);
	ProjectSettings::get_singleton()->set_initial_value(p_var, p_default);
	ProjectSettings::get_singleton()->set_builtin_order(p_var);
	ProjectSettings::get_singleton()->set_as_basic(p_var, p_basic);
	ProjectSettings::get_singleton()->set_restart_if_changed(p_var, p_restart_if_changed);
	ProjectSettings::get_singleton()->set_ignore_value_in_docs(p_var, p_ignore_value_in_docs);
	ProjectSettings::get_singleton()->set_as_internal(p_var, p_internal);
	return ret;
}
Variant _GLOBAL_DEF(const PropertyInfo &p_info, const Variant &p_default, bool p_restart_if_changed, bool p_ignore_value_in_docs, bool p_basic, bool p_internal) {