[promises] Move PromiseResolveThenableJob to c++

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index f629b33741983c6cf8e7f305b5dca53beb9fb7f8..fdeaac5607ea2ec9f40e7c9ed660c2a35d222b71 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -1108,6 +1108,7 @@ 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_; }