Fix/11134 Fix #11134 Hir of `qpath` will be `TypeRelative(Ty { kind: Path(LangItem...` when a closure contains macro (e.g. https://github.com/rust-lang/rust-clippy/issues/11651) and #11134, it causes panic. This PR avoids panicking and emitting incomplete path string when `qpath` contains `LangItem`. changelog: none