Add Support for Attu like in The milvus helm chart

I'm not sure if Attu is supported or not by the operator. if it is, it would be great if it could be added to the docs (docs/CRD maybe..)

if not, it would be lovely to add support to it, like I can deploy the Milvus helm chart with env variable like this:

helm install my-release milvus/milvus --set attu.enabled=true

it would be great if we can set it under the components part of the yaml file