metricsServer update to 3.12.1-bb.6

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/metrics-server/-/blob/3.12.1-bb.6/CHANGELOG.md

Package MR

big-bang/product/packages/metrics-server!120 (merged)

For Issue

For big-bang/product/packages/metrics-server#98

Upgrade Notices

N/A