Include required s3 region and disable redirect [Docs]

What does this MR do?

Include required s3 region in docs and disable redirect due to

https://gitlab.com/gitlab-org/gitlab-ce/issues/19356 https://gitlab.com/gitlab-org/gitlab-ce/issues/19963

Are there points in the code the reviewer needs to double check?

Source configuration for redirect disable?

Does this MR meet the acceptance criteria?

• [x ] Documentation created/updated