grafana update to 7.3.8-bb.1

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/grafana/-/blob/7.3.8-bb.1/CHANGELOG.md

Package MR

big-bang/product/packages/grafana!92 (merged)

For Issue

big-bang/product/packages/grafana#48 (closed)

Upgrade Notices

N/A