Rollup merge of #90071 - cjgillot:no-blocks, r=oli-obk

Remove hir::map::blocks and use FnKind instead

The principal tool is `FnLikeNode`, which is not often used and can be easily implemented using `rustc_hir::intravisit::FnKind`.

compiler/rustc_mir_transform/src/lib.rs

@@ -429,8 +429,7 @@ fn mir_drops_elaborated_and_const_checked<'tcx>(
     }
 
     let hir_id = tcx.hir().local_def_id_to_hir_id(def.did);
-    use rustc_middle::hir::map::blocks::FnLikeNode;
-    let is_fn_like = FnLikeNode::from_node(tcx.hir().get(hir_id)).is_some();
+    let is_fn_like = tcx.hir().get(hir_id).fn_kind().is_some();
     if is_fn_like {
         let did = def.did.to_def_id();
         let def = ty::WithOptConstParam::unknown(did);