### 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_icall.is_static) {
		r_output << INDENT2 "if (" CS_PARAM_INSTANCE " == IntPtr.Zero)\n"
				 << INDENT3 "throw new ArgumentNullException(nameof(" CS_PARAM_INSTANCE "));\n";
	}
	String argc_str = itos(p_icall.get_arguments_count());
	auto generate_call_and_return_stmts = [&](const char *base_indent) {
		if (p_icall.is_vararg) {
			
			r_output << base_indent;
			
			
			
			
			
			if (!ret_void) {
				if (return_type->cname != name_cache.type_Variant) {
					
					
					r_output << "using godot_variant " << C_LOCAL_VARARG_RET " = ";
				} else {
					
					r_output << "godot_variant " << C_LOCAL_RET " = ";
				}
			}
			r_output << C_CLASS_NATIVE_FUNCS ".godotsharp_method_bind_call("
					 << CS_PARAM_METHODBIND ", " << (p_icall.is_static ? "IntPtr.Zero" : CS_PARAM_INSTANCE)
					 << ", " << (p_icall.get_arguments_count() ? "(godot_variant**)" C_LOCAL_PTRCALL_ARGS : "null")
					 << ", total_length, out _);\n";
			if (!ret_void) {
				if (return_type->cname != name_cache.type_Variant) {