### 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
}
	}
	while (can_have_class_or_extends) {
		
		switch (current.type) {
			case GDScriptTokenizer::Token::CLASS_NAME:
				advance();
				if (head->identifier != nullptr) {
					push_error(R"("class_name" can only be used once.)");
				} else {
					parse_class_name();
				}
				break;
			case GDScriptTokenizer::Token::EXTENDS:
				advance();
				if (head->extends_used) {
					push_error(R"("extends" can only be used once.)");
				} else {
					parse_extends();
					end_statement("superclass");
				}
				break;
			default:
				
				can_have_class_or_extends = false;
				break;
		}
		if (panic_mode) {
			synchronize();
		}