### 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
identifier->constant_source = declaration.constant;
				declaration.constant->usages++;
				break;
			case SuiteNode::Local::VARIABLE:
				identifier->source = IdentifierNode::LOCAL_VARIABLE;
				identifier->variable_source = declaration.variable;
				declaration.variable->usages++;
				break;
			case SuiteNode::Local::PARAMETER:
				identifier->source = IdentifierNode::FUNCTION_PARAMETER;
				identifier->parameter_source = declaration.parameter;
				declaration.parameter->usages++;
				break;
			case SuiteNode::Local::FOR_VARIABLE:
				identifier->source = IdentifierNode::LOCAL_ITERATOR;
				identifier->bind_source = declaration.bind;
				declaration.bind->usages++;
				break;
			case SuiteNode::Local::PATTERN_BIND:
				identifier->source = IdentifierNode::LOCAL_BIND;
				identifier->bind_source = declaration.bind;
				declaration.bind->usages++;
				break;
			case SuiteNode::Local::UNDEFINED:
				ERR_FAIL_V_MSG(nullptr, "Undefined local found.");
		}
	}
	return identifier;
}
GDScriptParser::LiteralNode *GDScriptParser::parse_literal() {