### 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)

GDScriptCodeGenerator::Address op_result = codegen.add_temporary(_gdtype_from_datatype(assignment->get_datatype(), codegen.script));
					GDScriptCodeGenerator::Address member = codegen.add_temporary(_gdtype_from_datatype(assignment->assignee->get_datatype(), codegen.script));
					gen->write_get_member(member, name);
					gen->write_binary_operator(op_result, assignment->variant_op, member, assigned_value);
					gen->pop_temporary(); 
					to_assign = op_result;
				}
				gen->write_set_member(to_assign, name);
				if (to_assign.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					gen->pop_temporary(); 
				}
				if (has_operation && assigned_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					gen->pop_temporary(); 
				}
			} else {
				
				ERR_FAIL_COND_V_MSG(assignment->assignee->type != GDScriptParser::Node::IDENTIFIER, GDScriptCodeGenerator::Address(), "Expected the assignee to be an identifier here.");
				GDScriptCodeGenerator::Address member;
				bool is_member = false;
				bool has_setter = false;
				bool is_in_setter = false;
				bool is_static = false;
				GDScriptCodeGenerator::Address static_var_class;
				int static_var_index = 0;
				GDScriptDataType static_var_data_type;
				StringName var_name;
				StringName setter_function;
				var_name = static_cast<const GDScriptParser::IdentifierNode *>(assignment->assignee)->name;
				if (!_is_local_or_parameter(codegen, var_name)) {
					if (codegen.script->member_indices.has(var_name)) {