### 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
ArrayNode *array = alloc_node<ArrayNode>();
	if (!check(GDScriptTokenizer::Token::BRACKET_CLOSE)) {
		do {
			if (check(GDScriptTokenizer::Token::BRACKET_CLOSE)) {
				
				break;
			}
			ExpressionNode *element = parse_expression(false);
			if (element == nullptr) {
				push_error(R"(Expected expression as array element.)");
			} else {
				array->elements.push_back(element);
			}
		} while (match(GDScriptTokenizer::Token::COMMA) && !is_at_end());
	}
	pop_multiline();
	consume(GDScriptTokenizer::Token::BRACKET_CLOSE, R"(Expected closing "]" after array elements.)");
	complete_extents(array);
	return array;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_dictionary(ExpressionNode *p_previous_operand, bool p_can_assign) {