Customer want to change the istio proxy logLevel to warning at global level.

UseCase:
They had more than 500 deployment and want to change logLevel: warning(globally)

We tried following the annotation[1]- "sidecar.istio.io/logLevel": debug # level can be: trace, debug, info, warning, error, critical, off and tried to set spec.proxy.logging.level: warning in ServiceMeshControlPlane as per the documentaion[2] nothing seems to be working to be working.

Requesting you to provide the way to achieve the above use case.

[1] https://access.redhat.com/solutions/6303361
[2] https://docs.openshift.com/container-platform/4.9/service_mesh/v2x/ossm-reference-smcp.html