istioOperator update to 1.20.4-bb.0

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/istio-operator/-/blob/1.20.4-bb.0/CHANGELOG.md

Package MR

big-bang/product/packages/istio-operator!114 (merged)

For Issue

Closes big-bang/product/packages/istio-operator#73 (closed)

Closes big-bang/product/packages/istio-controlplane#137 (closed)

Upgrade Notices

N/A