[heap] Add three new THP API calls

Bug: v8:9533
Change-Id: I87d653147896530a4b5115b126d652f626dd4665
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2463005Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70481}

src/heap/third-party/heap-api.h

@@ -30,8 +30,13 @@ class Heap {
 
   static bool InReadOnlySpace(Address address);
 
+  static bool InLargeObjectSpace(Address address);
+
   static bool IsValidHeapObject(HeapObject object);
 
+  void ResetIterator();
+  HeapObject NextObject();
+
   bool CollectGarbage();
 };