### 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)

for (int i = 0; i < summary_lines.size(); i++) {
				output.append("/// ");
				output.append(summary_lines[i]);
				output.append("\n");
			}
			output.append("/// </summary>\n");
		}
	}
	
	
	
	if (itype.name != itype.proxy_name) {
		output << "[GodotClassName(\"" << itype.name << "\")]\n";
	}
	output.append("public ");
	if (itype.is_singleton) {
		output.append("static partial class ");
	} else {
		
		
		
		
		output.append("partial class ");
	}
	output.append(itype.proxy_name);
	if (is_derived_type && !itype.is_singleton) {
		if (obj_types.has(itype.base_name)) {
			output.append(" : ");
			output.append(obj_types[itype.base_name].proxy_name);
		} else {