Resolve "Set Metrics retention to forever"

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/thanos/-/blob/d68b58a7105a5a57dd6f9ea591318d8ddb293e2f/CHANGELOG.md

Package MR

big-bang/product/packages/thanos!90 (merged)

For Issue

Closes big-bang/product/packages/thanos#67 (closed)

Upgrade Notices

N/A