### 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
previous_operand = (this->*infix_rule)(previous_operand, p_can_assign);
	}
	return previous_operand;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_expression(bool p_can_assign, bool p_stop_on_assign) {
	return parse_precedence(PREC_ASSIGNMENT, p_can_assign, p_stop_on_assign);
}
GDScriptParser::IdentifierNode *GDScriptParser::parse_identifier() {
	IdentifierNode *identifier = static_cast<IdentifierNode *>(parse_identifier(nullptr, false));
#ifdef DEBUG_ENABLED
	
	if (identifier && TS->has_feature(TextServer::FEATURE_UNICODE_SECURITY) && TS->spoof_check(identifier->name.operator String())) {
		push_warning(identifier, GDScriptWarning::CONFUSABLE_IDENTIFIER, identifier->name.operator String());
	}
#endif
	return identifier;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_identifier(ExpressionNode *p_previous_operand, bool p_can_assign) {
	if (!previous.is_identifier()) {
		ERR_FAIL_V_MSG(nullptr, "Parser bug: parsing identifier node without identifier token.");
	}
	IdentifierNode *identifier = alloc_node<IdentifierNode>();
	complete_extents(identifier);
	identifier->name = previous.get_identifier();
	if (current_suite != nullptr && current_suite->has_local(identifier->name)) {
		const SuiteNode::Local &declaration = current_suite->get_local(identifier->name);
		identifier->source_function = declaration.source_function;
		switch (declaration.type) {
			case SuiteNode::Local::CONSTANT:
				identifier->source = IdentifierNode::LOCAL_CONSTANT;