Charts: [stable/sonatype-nexus] Add support for an S3 bucket back up

[ChrisCooney]

Is this a BUG REPORT or FEATURE REQUEST? (choose one): FEATURE REQUEST

At the moment, the Sonatype nexus chart supports GCP buckets, but has no support for AWS S3 buckets. We should update the Helm chart to include S3 as a viable backup.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Any further update will cause the issue/pull request to no longer be considered stale. Thank you for your contributions.

[stale[bot]]

This issue is being automatically closed due to inactivity.

[draeron]

can this issue be re-open ?