### 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
TernaryOpNode *operation = alloc_node<TernaryOpNode>();
	reset_extents(operation, p_previous_operand);
	update_extents(operation);
	operation->true_expr = p_previous_operand;
	operation->condition = parse_precedence(PREC_TERNARY, false);
	if (operation->condition == nullptr) {
		push_error(R"(Expected expression as ternary condition after "if".)");
	}
	consume(GDScriptTokenizer::Token::ELSE, R"(Expected "else" after ternary operator condition.)");
	operation->false_expr = parse_precedence(PREC_TERNARY, false);
	if (operation->false_expr == nullptr) {
		push_error(R"(Expected expression after "else".)");
	}
	complete_extents(operation);
	return operation;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_assignment(ExpressionNode *p_previous_operand, bool p_can_assign) {