### 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)

if (!p_for_lambda && (is_implicit_initializer || is_implicit_ready)) {
		
		for (int i = 0; i < p_class->members.size(); i++) {
			if (p_class->members[i].type != GDScriptParser::ClassNode::Member::VARIABLE) {
				continue;
			}
			const GDScriptParser::VariableNode *field = p_class->members[i].variable;
			if (field->is_static) {
				continue;
			}
			if (field->onready != is_implicit_ready) {
				
				continue;
			}
			if (field->initializer) {
				
				codegen.generator->write_newline(field->initializer->start_line);
				GDScriptCodeGenerator::Address src_address = _parse_expression(codegen, r_error, field->initializer, false, true);
				if (r_error) {
					memdelete(codegen.generator);
					return nullptr;
				}
				GDScriptDataType field_type = _gdtype_from_datatype(field->get_datatype(), codegen.script);
				GDScriptCodeGenerator::Address dst_address(GDScriptCodeGenerator::Address::MEMBER, codegen.script->member_indices[field->identifier->name].index, field_type);
				if (field->use_conversion_assign) {
					codegen.generator->write_assign_with_conversion(dst_address, src_address);
				} else {
					codegen.generator->write_assign(dst_address, src_address);
				}
				if (src_address.mode == GDScriptCodeGenerator::Address::TEMPORARY) {