### 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 res_path = resource_path.path_join("");
		
		
		cwd = cwd.path_join("");
		if (!cwd.begins_with(res_path)) {
			return p_path;
		}
		return cwd.replace_first(res_path, "res://");
	} else {
		int sep = path.rfind("/");
		if (sep == -1) {
			return "res://" + path;
		}
		String parent = path.substr(0, sep);
		String plocal = localize_path(parent);
		if (plocal.is_empty()) {
			return "";
		}
		
		if (plocal[plocal.length() - 1] == '/') {
			sep += 1;
		}
		return plocal + path.substr(sep, path.size() - sep);
	}
}
void ProjectSettings::set_initial_value(const String &p_name, const Variant &p_value) {