Draft: istio update to 1.21.2-bb.1

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/istio-controlplane/-/blob/1.21.2-bb.1/CHANGELOG.md

Package MR

big-bang/product/packages/istio-controlplane!264 (merged)

For Issue

• Closes big-bang/product/packages/istio-controlplane#118 (closed)
• Closes big-bang/product/packages/istio-operator#58 (closed)

Upgrade Notices

n/a