[heap] Restore always allocate scope in SimulateNewspaceFull

This reverts part of f3babafb that removed the scope in the test function

Bug: v8:10298
Change-Id: I3c515307b9ea4d03e0d7427422d46302e78d8b38
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2087395Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66581}

src/runtime/runtime-test.cc

@@ -730,6 +730,7 @@ RUNTIME_FUNCTION(Runtime_SimulateNewspaceFull) {
   HandleScope scope(isolate);
   Heap* heap = isolate->heap();
   NewSpace* space = heap->new_space();
+  AlwaysAllocateScopeForTesting always_allocate(heap);
   do {
     FillUpOneNewSpacePage(isolate, heap);
   } while (space->AddFreshPage());