[promises] Move PromiseResolveThenableJob to c++

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index b9ba54ea463462bbd8635afa6a855789a5bdadf0..5b19f2bad3d1043f71395b9d8b5061de72b48df8 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -1105,6 +1105,7 @@ class Isolate {
   void ReportPromiseReject(Handle<JSObject> promise, Handle<Object> value,
                            v8::PromiseRejectEvent event);
 
+  void PromiseResolveThenableJob(Handle<PromiseContainer> container);
   void EnqueueMicrotask(Handle<Object> microtask);
   void RunMicrotasks();
   bool IsRunningMicrotasks() const { return is_running_microtasks_; }