[red-knot] Panic: Could not find missing expression ID

A few ecosystem projects currently fail with
```
thread '<unnamed>' panicked at crates/red_knot_python_semantic/src/semantic_index/ast_ids.rs:39:13:
Could not find expression ID for ExpressionNodeKey(NodeKey(131888927259800))
```
(see `bad.txt` => "missing expression ID")
