Backup to s3 compatible service in 7.1

Hi, I am using FDB 7.1 and want to back up to an s3 compatible service.

I noticed that there already exists a PR to make backup work with s3 compatible service: Make backup work with s3 compatible service (#6355)(#6382) by wangzw · Pull Request #7324 · apple/foundationdb · GitHub. But this PR is only cherry-picked to 7.2, and all 7.2 related release is tagged with “pre-release”.

Could someone help to cherry-pick this PR to 7.1?