### 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
#ifdef DEBUG_ENABLED
	bool has_error = false;
	for (const Variant &warning_name : p_annotation->resolved_arguments) {
		GDScriptWarning::Code warning = GDScriptWarning::get_code_from_name(String(warning_name).to_upper());
		if (warning == GDScriptWarning::WARNING_MAX) {
			push_error(vformat(R"(Invalid warning name: "%s".)", warning_name), p_annotation);
			has_error = true;
		} else {
			p_node->ignored_warnings.push_back(warning);
		}
	}
	return !has_error;
#else 
	
	return true;
#endif 
}
bool GDScriptParser::rpc_annotation(const AnnotationNode *p_annotation, Node *p_node) {