### 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)
const String &prop_name = p_info.name;
	ERR_FAIL_COND(!props.has(prop_name));
	custom_prop_info[prop_name] = p_info;
}
const HashMap<StringName, PropertyInfo> &ProjectSettings::get_custom_property_info() const {
	return custom_prop_info;
}
bool ProjectSettings::is_using_datapack() const {
	return using_datapack;
}
bool ProjectSettings::_property_can_revert(const StringName &p_name) const {
	if (!props.has(p_name)) {
		return false;
	}
	return props[p_name].initial != props[p_name].variant;
}
bool ProjectSettings::_property_get_revert(const StringName &p_name, Variant &r_property) const {
	if (!props.has(p_name)) {
		return false;
	}
	r_property = props[p_name].initial;
	return true;
}
void ProjectSettings::set_setting(const String &p_setting, const Variant &p_value) {