Allow to set pod annotations in post-install-upgrade job in helm chart

[petrkohut]

Description

I would like to have an option to add pod annotations to the zookeeper-post-install-upgrade K8s job.
My problem is, that I wan't to disable istio proxy sidecar injection to the pod, but without the annotation I can do it only on the namespace level.

Importance

should-have

Location

Charts

Suggestions for an improvement

Update the:

• https://github.com/pravega/zookeeper-operator/blob/master/charts/zookeeper/templates/post-install-upgrade-hooks.yaml
• https://github.com/pravega/zookeeper-operator/blob/master/charts/zookeeper/values.yaml