### 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
return kind == GDScriptParser::DataType::BUILTIN && _variant_type_to_typed_array_element_type(builtin_type) != Variant::NIL;
}
GDScriptParser::DataType GDScriptParser::DataType::get_typed_container_type() const {
	GDScriptParser::DataType type;
	type.kind = GDScriptParser::DataType::BUILTIN;
	type.builtin_type = _variant_type_to_typed_array_element_type(builtin_type);
	return type;
}
void GDScriptParser::complete_extents(Node *p_node) {
	while (!nodes_in_progress.is_empty() && nodes_in_progress.back()->get() != p_node) {
		ERR_PRINT("Parser bug: Mismatch in extents tracking stack.");
		nodes_in_progress.pop_back();
	}
	if (nodes_in_progress.is_empty()) {
		ERR_PRINT("Parser bug: Extents tracking stack is empty.");
	} else {
		nodes_in_progress.pop_back();
	}
}
void GDScriptParser::update_extents(Node *p_node) {