Moving thanos out of sandbox to product/packages

General MR

Summary

Moving thanos URL from sandbox to product/packages

Closes https://repo1.dso.mil/big-bang/apps/sandbox/thanos/-/issues/26

added kinddocs statusreview labels

requested review from @chris.oconnell and @michaelmartin

assigned to @ryan.j.garcia

changed milestone to %2.18.0

approved this merge request

merged

mentioned in commit 21534e1f