feat: add remote import s3 - #2357

Looks great @abhiandthetruth thanks for the quick work again. Just a few quick notes :)

There is again a bit of replicated code from import_project function. Can't find a way to refactor it because it is quite small and creating any common entity just feals like overkill. Let me know if anyone has a way to go over it, else I think this much replication might be tolerable.

I agree, no need yet. We have plenty of other custom methods where this is an issue as well.

I think it would need a lot of rework but another decorator with required/optional payload attributes might make these methods more declarative instead of parsing args inside every method. Something like #1999 if we revive that at some point.

Thanks a lot for this @abhiandthetruth, as you seem keen on contributing more later I added a small non-blocking note for a potential follow-up :) LGTM!