istio update to 1.19.6-bb.0

General MR

Summary

big-bang/product/packages/istio-controlplane!202 (merged)

Relevant logs/screenshots

(Include any relevant logs/screenshots)

Linked Issue

Closes big-bang/product/packages/istio-controlplane#129 (closed)

Upgrade Notices

• Istio gets updated to 1.19.6. BigBang apps should automatically cycle to get the latest sidecar config and version. Be sure to cycle pods for any community or tenant applications manually.