thanos update to 15.9.1-bb.3

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/thanos/-/blob/15.9.1-bb.3/CHANGELOG.md

Package MR

big-bang/product/packages/thanos!121 (merged)

For Issue

Closes (link to issue here)

Upgrade Notices

N/A

added botmr statusdoing thanos labels

assigned to @blairbowden

changed the description

requested review from @michaelmartin, @chris.oconnell, and @andrewshoell

marked this merge request as ready

added statusreview label and removed statusdoing label

changed milestone to %2.50.0

approved this merge request

merged

mentioned in commit 3cad8a44