Call IteratorClose if js_promise_resolve throws in js_async_from_sync_iterator_next

[goffrie]

As specified in https://tc39.es/ecma262/#sec-asyncfromsynciteratorcontinuation:

6. Let valueWrapper be Completion(PromiseResolve(%Promise%, value)).
7. If valueWrapper is an abrupt completion, done is false, and closeOnRejection is true, then
   7a. Set valueWrapper to Completion(IteratorClose(syncIteratorRecord, valueWrapper)).

closeOnRejection is true for %AsyncFromSyncIteratorPrototype%.next and .throw, i.e. magic != GEN_MAGIC_RETURN.

This fixes a few test262 cases.

Disclosure: this PR was created with LLM assistance, but all text is my own.

[goffrie]

Actually this is obviated by #1743, bellard quickjs already fixed this and a host of other issues.