### 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)

String arguments_sig;
	String delegate_type_params;
	if (!p_isignal.arguments.is_empty()) {
		delegate_type_params += "<";
	}
	
	const ArgumentInterface &first = p_isignal.arguments.front()->get();
	for (const ArgumentInterface &iarg : p_isignal.arguments) {
		const TypeInterface *arg_type = _get_type_or_null(iarg.type);
		ERR_FAIL_NULL_V(arg_type, ERR_BUG); 
		ERR_FAIL_COND_V_MSG(arg_type->is_singleton, ERR_BUG,
				"Argument type is a singleton: '" + iarg.name + "' of signal '" + p_itype.name + "." + p_isignal.name + "'.");
		if (p_itype.api_type == ClassDB::API_CORE) {
			ERR_FAIL_COND_V_MSG(arg_type->api_type == ClassDB::API_EDITOR, ERR_BUG,
					"Argument '" + iarg.name + "' of signal '" + p_itype.name + "." + p_isignal.name + "' has type '" +
							arg_type->name + "' from the editor API. Core API cannot have dependencies on the editor API.");
		}
		
		if (&iarg != &first) {
			arguments_sig += ", ";
			delegate_type_params += ", ";
		}
		arguments_sig += arg_type->cs_type;
		arguments_sig += " ";
		arguments_sig += iarg.name;
		delegate_type_params += arg_type->cs_type;
	}
	if (!p_isignal.arguments.is_empty()) {
		delegate_type_params += ">";
	}