Enabling locality-restricted self-stored backups on Dedicated

[alicia-l2]

The backups happening on crl-prod-kb2 are not pinned to eu-central-1 where the S3 bucket is located. This leads to excessive traffic going through the NAT gateway which is very expensive.

https://docs.google.com/document/d/1lH8kBmUQSpvYKKcnBySQp1TPlFO1eozwcX8kC5MsVBI/edit has a break down of the investigation.

We need to change the backups to indicate the proper locality, to do so, DR needs to enable locality restricted backups on cloud.

https://cockroachlabs.atlassian.net/browse/CLOUDOPS-7586

Jira issue: CRDB-36683

Epic CRDB-36299

[blathers-crl[bot]]

cc @cockroachdb/disaster-recovery