### 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
push_text("Match ");
	print_expression(p_match->test);
	push_line(" :");
	increase_indent();
	for (int i = 0; i < p_match->branches.size(); i++) {
		print_match_branch(p_match->branches[i]);
	}
	decrease_indent();
}
void GDScriptParser::TreePrinter::print_match_branch(MatchBranchNode *p_match_branch) {