### Godot version

4.0.beta10.mono.official

### System information

Windows 11

### Issue description

After registering a C# Script with Autoload and trying to connect to a signal using the `Signal.connect` method (`Singleton.Signal.connect(xxx)`) fails with `Invalid get index 'Signal' (on base: 'Node (Singleton.cs)'). But with `Object.connect` it works.

### Steps to reproduce

- Create a C# class script with a Signal named `Signal` (could be any other).
- Register it with Autoload with the name `Singleton` (could be any other).
- Create a GDScript script and try to connect the Singleton's signal using `Singleton.Signal.connect(xxx)`
- When running the project it fails with `Invalid get index 'Sample' (on base: 'Node (Singleton.cs)').`

### Minimal reproduction project

[example.zip](https://github.com/godotengine/godot/files/10414500/example.zip)

if (p_link_target_parts[0] == name_cache.type_at_GlobalScope) {
		if (OS::get_singleton()->is_stdout_verbose()) {
			OS::get_singleton()->print("Cannot resolve @GlobalScope method reference in documentation: %s\n", p_link_target.utf8().get_data());
		}
		
		_append_xml_undeclared(p_xml_output, p_link_target);
	} else if (!p_target_itype || !p_target_itype->is_object_type) {
		if (OS::get_singleton()->is_stdout_verbose()) {
			if (p_target_itype) {
				OS::get_singleton()->print("Cannot resolve method reference for non-Godot.Object type in documentation: %s\n", p_link_target.utf8().get_data());