### 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.find("/") >= 0) {
		
		_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 member reference for non-Godot.Object type in documentation: %s\n", p_link_target.utf8().get_data());
			} else {
				OS::get_singleton()->print("Cannot resolve type from member reference in documentation: %s\n", p_link_target.utf8().get_data());
			}
		}
		
		_append_xml_undeclared(p_xml_output, p_link_target);
	} else {
		const TypeInterface *current_itype = p_target_itype;
		const PropertyInterface *target_iprop = nullptr;
		while (target_iprop == nullptr && current_itype != nullptr) {
			target_iprop = current_itype->find_property_by_name(p_target_cname);
			if (target_iprop == nullptr) {
				current_itype = _get_type_or_null(TypeReference(current_itype->base_name));
			}
		}
		if (target_iprop) {
			p_xml_output.append("<see cref=\"" BINDINGS_NAMESPACE ".");
			p_xml_output.append(current_itype->proxy_name);
			p_xml_output.append(".");
			p_xml_output.append(target_iprop->proxy_name);
			p_xml_output.append("\"/>");
		} else {
			ERR_PRINT("Cannot resolve member reference in documentation: '" + p_link_target + "'.");