Draft: loki update to 6.6.4-bb.5

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/loki/-/blob/6.6.4-bb.5/CHANGELOG.md

Package MR

big-bang/product/packages/loki!249 (merged)

For Issue

Closes (link to issue here)

Upgrade Notices

This MR sets a default 31 day log retention policy. Logs older than the 31 days will be deleted. To override this policy, please update the value at .Values.loki.limits_config.retention_period.