### 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
decrease_indent();
			}
		}
	}
	decrease_indent();
	push_line();
}
void GDScriptParser::TreePrinter::print_while(WhileNode *p_while) {
	push_text("While ");
	print_expression(p_while->condition);
	push_line(" :");
	increase_indent();
	print_suite(p_while->loop);
	decrease_indent();
}
void GDScriptParser::TreePrinter::print_tree(const GDScriptParser &p_parser) {
	ERR_FAIL_COND_MSG(p_parser.get_tree() == nullptr, "Parse the code before printing the parse tree.");
	if (p_parser.is_tool()) {
		push_line("@tool");
	}
	if (!p_parser.get_tree()->icon_path.is_empty()) {
		push_text(R"(@icon (")");
		push_text(p_parser.get_tree()->icon_path);
		push_line("\")");
	}
	print_class(p_parser.get_tree());
	print_line(String(printed));
}
#endif