### 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)
ERR_FAIL_COND_MSG(!props.has(p_name), "Request for nonexistent project setting: " + p_name + ".");
#ifdef DEBUG_METHODS_ENABLED
	props[p_name].ignore_value_in_docs = p_ignore;
#endif
}
bool ProjectSettings::get_ignore_value_in_docs(const String &p_name) const {
	ERR_FAIL_COND_V_MSG(!props.has(p_name), false, "Request for nonexistent project setting: " + p_name + ".");
#ifdef DEBUG_METHODS_ENABLED
	return props[p_name].ignore_value_in_docs;
#else
	return false;
#endif
}
String ProjectSettings::globalize_path(const String &p_path) const {
	if (p_path.begins_with("res://")) {
		if (!resource_path.is_empty()) {
			return p_path.replace("res:/", resource_path);
		}
		return p_path.replace("res://", "");
	} else if (p_path.begins_with("user://")) {
		String data_dir = OS::get_singleton()->get_user_data_dir();
		if (!data_dir.is_empty()) {
			return p_path.replace("user:/", data_dir);
		}
		return p_path.replace("user://", "");
	}
	return p_path;
}
bool ProjectSettings::_set(const StringName &p_name, const Variant &p_value) {