Rollup merge of #98844 - cjgillot:deep-visit, r=jyn514

Reword comments and rename HIR visiting methods.

Sparked by this discussion in [zulip](https://rust-lang.zulipchat.com/#narrow/stream/182449-t-compiler.2Fhelp/topic/Confused.20by.20comment.20on.20.60deep_visit_item_likes_in_module.60)

r? ``@jyn514`` ``@camsteffen``

compiler/rustc_mir_transform/src/lib.rs

@@ -173,7 +173,7 @@ fn mir_keys(tcx: TyCtxt<'_>, (): ()) -> FxIndexSet<LocalDefId> {
             intravisit::walk_struct_def(self, v)
         }
     }
-    tcx.hir().deep_visit_all_item_likes(&mut GatherCtors { tcx, set: &mut set });
+    tcx.hir().visit_all_item_likes_in_crate(&mut GatherCtors { tcx, set: &mut set });
 
     set
 }