[super IC] Fix receiver vs lookup start object confusion

Bug: v8:9237,chromium:1308360
Change-Id: I11e3c14a6cecb9d88a834711fb6252191494d5f7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3545172Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79571}

src/ic/accessor-assembler.cc

@@ -283,7 +283,8 @@ void AccessorAssembler::HandleLoadAccessor(
   BIND(&load);
   TNode<IntPtrT> argc = IntPtrConstant(0);
   exit_point->Return(CallApiCallback(context, callback, argc, data,
-                                     api_holder.value(), p->receiver()));
+                                     api_holder.value(),
+                                     p->lookup_start_object()));
 }
 
 void AccessorAssembler::HandleLoadField(TNode<JSObject> holder,