worker: call CancelTerminateExecution() before exiting Locker

As the comment indicates, this fixes a DCHECK failure, although I don’t
quite understand why it is happening in the first place.

PR-URL: #33347
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>

src/node_worker.cc

@@ -260,6 +260,11 @@ void Worker::Run() {
 
     DeleteFnPtr<Environment, FreeEnvironment> env_;
     auto cleanup_env = OnScopeLeave([&]() {
+      // TODO(addaleax): This call is harmless but should not be necessary.
+      // Figure out why V8 is raising a DCHECK() here without it
+      // (in test/parallel/test-async-hooks-worker-asyncfn-terminate-4.js).
+      isolate_->CancelTerminateExecution();
+
       if (!env_) return;
       env_->set_can_call_into_js(false);