Rollup merge of #107125 - WaffleLapkin:expect_an_item_in_your_hir_by_the_next_morning, r=Nilstrieb

Add and use expect methods to hir.

[The future has come](https://github.com/rust-lang/rust/pull/106090/files#r1070062462).

r? `@Nilstrieb`

tbh I'm not even sure if it's worth it

compiler/rustc_hir_analysis/src/coherence/builtin.rs

@@ -56,7 +56,7 @@ fn visit_implementation_of_drop(tcx: TyCtxt<'_>, impl_did: LocalDefId) {
         _ => {}
     }
 
-    let ItemKind::Impl(impl_) = tcx.hir().expect_item(impl_did).kind else { bug!("expected Drop impl item") };
+    let impl_ = tcx.hir().expect_item(impl_did).expect_impl();
 
     tcx.sess.emit_err(DropImplOnWrongItem { span: impl_.self_ty.span });
 }