Add scope to ignore istio side car

[salla2]

Hi, we having issues while accessing redis svc when istio side car running on the redis pods. Can we include options for adding annotations to ignore running side car, We generally do that today by adding the below annotations but I'm not seeing we can add this option at distributedrediscluster yaml. It would be great if we can have the below feature. sidecar.istio.io/inject: "true" @polefishu