vault update to 0.31.0-bb.8

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/vault/-/blob/0.31.0-bb.8/CHANGELOG.md

Package MR

big-bang/product/packages/vault!280 (merged)

For Issue

Closes (big-bang/product/packages/vault#186 (closed))

Upgrade Notices

N/A