### Godot version

v4.0.beta14.official [28a24639c]

### System information

MacOS 12.6.2

### Issue description

Beta 14 throws an error for custom `@icon`, e.g.
```
class_name StateMachine extends Node

@icon("res://assets/icons/state_machine.svg")
```
> Annotation "`@icon`" is not allowed in this level.

In beta 13 and before that worked fine.

### Steps to reproduce

1. Add a custom `@icon` in a custom node script.
2. Error message: Annotation "`@icon`" is not allowed in this level.

There are possibly other errors because a `class_name` node is now not recognized if extended by other classes, but they should resolve if `@icon` is removed.

### Minimal reproduction project

N/A
print_identifier(p_parameter->identifier);
	if (p_parameter->datatype_specifier != nullptr) {
		push_text(" : ");
		print_type(p_parameter->datatype_specifier);
	}
	if (p_parameter->initializer != nullptr) {
		push_text(" = ");
		print_expression(p_parameter->initializer);
	}
}
void GDScriptParser::TreePrinter::print_preload(PreloadNode *p_preload) {
	push_text(R"(Preload ( ")");
	push_text(p_preload->resolved_path);
	push_text(R"(" )");
}
void GDScriptParser::TreePrinter::print_return(ReturnNode *p_return) {
	push_text("Return");
	if (p_return->return_value != nullptr) {
		push_text(" ");
		print_expression(p_return->return_value);
	}
	push_line();
}
void GDScriptParser::TreePrinter::print_self(SelfNode *p_self) {