### 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)
late_update_files.insert(p_file);
		_save_late_updated_files(); 
	}
	fs->files[cpos]->type = type;
	fs->files[cpos]->resource_script_class = script_class;
	fs->files[cpos]->uid = uid;
	fs->files[cpos]->script_class_name = _get_global_script_class(type, p_file, &fs->files[cpos]->script_class_extends, &fs->files[cpos]->script_class_icon_path);
	fs->files[cpos]->import_group_file = ResourceLoader::get_import_group_file(p_file);
	fs->files[cpos]->modified_time = FileAccess::get_modified_time(p_file);
	fs->files[cpos]->deps = _get_dependencies(p_file);
	fs->files[cpos]->import_valid = type == "TextFile" ? true : ResourceLoader::is_import_valid(p_file);
	if (uid != ResourceUID::INVALID_ID) {
		if (ResourceUID::get_singleton()->has_id(uid)) {
			ResourceUID::get_singleton()->set_id(uid, p_file);
		} else {
			ResourceUID::get_singleton()->add_id(uid, p_file);
		}
		ResourceUID::get_singleton()->update_cache();
	}
	
	EditorResourcePreview::get_singleton()->check_for_invalidation(p_file);
	if (ClassDB::is_parent_class(fs->files[cpos]->type, SNAME("Script"))) {
		_queue_update_script_class(p_file);
	}
	_update_pending_script_classes();
	call_deferred(SNAME("emit_signal"), "filesystem_changed"); 
}
HashSet<String> EditorFileSystem::get_valid_extensions() const {