Expose `https://rest.alpha.fal.ai/requests/delete_io/{request_id}` in API

[qqii]

As described in your docs: https://docs.fal.ai/model-apis/payloads/. It would be great if we had access to this in the python APIs, as part of the A?SyncRequestHandle.

[DigitalArchon]

That function has been broken for ages anyway, CDN files are actually never deleted. There's multiple Discord threads about it.
But yes, if they make it work, it would be good to add it.