mimir update to 5.8.0-bb.6

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/mimir/-/blob/5.8.0-bb.6/CHANGELOG.md

Package MR

big-bang/product/packages/mimir!96 (merged)

For Issue

Closes big-bang/product/packages/mimir#88 (closed)

Upgrade Notices

Mimir is now leveraging our bb-common integration for all network policies and istio-related resources. Please refer to this blog post for additional information on the integration.