Support Annotations on Volume in CRD

[therealdwright]

I would like to propose adding an additional field to the volume spec in the operator of annotations that behaves the same as any other annotation spec in Kubernetes. The reason I would like this feature is we use the aws-ebs-csi-driver, which supports tuning volume resources via annotation such as provisioned IOPS and throughput which is something we routinely need to do for our Postgres deployments.

• Which image of the operator are you using? e.g. registry.opensource.zalan.do/acid/postgres-operator:v1.10.1 registry.opensource.zalan.do/acid/postgres-operator:v1.10.1

• Where do you run it - cloud or metal? Kubernetes or OpenShift? [AWS K8s | GCP ... | Bare Metal K8s] AWS EKS.

• Are you running Postgres Operator in production? [yes | no] Yes

• Type of issue? [Bug report, question, feature request, etc.] Feature request.

[FxKu]

So you mean a config options like podAnnotatoions or serviceAnnotations but for PVCs? Sounds doable. You want to create a PR for it?