loki update to 6.18.0-bb.0

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/loki/-/blob/6.18.0-bb.0/CHANGELOG.md

Package MR

big-bang/product/packages/loki!271 (merged)

For Issue

Closes big-bang/product/packages/loki#198 (closed)

Upgrade Notices

N/A