istio update to 1.20.4-bb.3

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/istio-controlplane/-/blob/1.20.4-bb.3/CHANGELOG.md

Package MR

big-bang/product/packages/istio-controlplane!220 (merged)

For Issue

Closes big-bang/product/packages/istio-controlplane#145 (closed)

Upgrade Notices

N/A