istioGateway update to 1.27.1-bb.2

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/istio-gateway/-/blob/1.27.1-bb.2/CHANGELOG.md

Package MR

big-bang/product/packages/istio-gateway!67 (merged)

For Issue

Closes big-bang/product/packages/istio-gateway#62

Upgrade Notices

NA