Follow up on https://esdiscuss.org/topic/promise-returning-delay-function

I think we really need that function, with AbortController support

We could do things like

```js
const abortFetch = new AbortController();
const abortTimeout = new AbortController();

await Promise.race([
  Promise.delay(5000, {signal: abortTimeout.signal}),
  fetch(url, {signal: abortFetch.signal}).then(r => r.json()).then(...),
])
  .finally(() => {
    abortFetch.abort();
    abortTimeout.abort(); // avoid mem leaks, that would call clearTimeout
under the hood
  })
```
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