### Godot version

4.0 RC 3

### System information

Macbook m1

### Issue description

If I normally use:
```
Skeleton2D.new()
```

if works.

If I use:
```
@export_group("Skeleton2D")
...
Skeleton2D.new()
```

I get error: `Invalid call. Nonexistent function 'new' in base 'Nil'.`

### Steps to reproduce

- Run a script where you have `@export_group` with same name as a node class name that you use `.new()` on.

```
extends Node2D
class_name Test

@export_group("Skeleton2D")

# Called when the node enters the scene tree for the first time.
func _ready():
	var skeleton = Skeleton2D.new()


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	pass
```

### Minimal reproduction project

[BugNew.zip](https://github.com/godotengine/godot/files/10818936/BugNew.zip)

GDScriptDataType static_var_data_type;
				StringName var_name;
				StringName member_property_setter_function;
				List<const GDScriptParser::SubscriptNode *> chain;
				{
					
					const GDScriptParser::SubscriptNode *n = subscript;
					while (true) {
						chain.push_back(n);
						if (n->base->type != GDScriptParser::Node::SUBSCRIPT) {
							
							if (n->base->type == GDScriptParser::Node::IDENTIFIER) {
								GDScriptParser::IdentifierNode *identifier = static_cast<GDScriptParser::IdentifierNode *>(n->base);
								var_name = identifier->name;
								if (_is_class_member_property(codegen, var_name)) {
									assign_class_member_property = var_name;
								} else if (!_is_local_or_parameter(codegen, var_name)) {
									if (codegen.script->member_indices.has(var_name)) {
										is_member_property = true;
										is_static = false;
										const GDScript::MemberInfo &minfo = codegen.script->member_indices[var_name];
										member_property_setter_function = minfo.setter;
										member_property_has_setter = member_property_setter_function != StringName();
										member_property_is_in_setter = member_property_has_setter && member_property_setter_function == codegen.function_name;
										target_member_property.mode = GDScriptCodeGenerator::Address::MEMBER;
										target_member_property.address = minfo.index;
										target_member_property.type = minfo.data_type;
									} else {
										
										GDScript *scr = codegen.script;