[13.x] Add isManagedQueue to CloudManager

[jackbayliss]

I've macro'd this, but I think it's worth adding on the manager as it's easier than going through the queue connection (as in most people won't realise this is there)

This gives anyone an easy answer of "Is this queue managed", which is very useful if you're multiple drivers- useful locally, and useful if you're using fifo in cloud.

This means we can do stuff like this:

if (Cloud::isManagedQueue('notifications.fifo')) {
    Queue::forward('notifications', 'notifications.fifo', 'cloud');
}

Feels cool to me, and imagine I won't be the only person to reach for this, but, feel free to adjust to throw away- just something I macro'd 🫡

[github-actions]

Thanks for submitting a PR!

Note that draft PRs are not reviewed. If you would like a review, please mark your pull request as ready for review in the GitHub user interface.

Pull requests that are abandoned in draft may be closed due to inactivity.