[Feature] no-broken-links#createReports should return only real promises in the array instead of Promise.resolve()

[molant]

With the changes in #1943 there's a lot of code in createReports that returns Promise.resolve(). We should return only real Promises instead of doing that.
For that we could change return urls.map((url) => { to something like:

const requests: Promise<void>[] = [];
urls.forEach((url) => {
// magic here
requests.push(realPromiseToAdd);
}

return requests;