In general it is very useful to get insights to how memory is used for humio nodes by leveraging things like jmap so we should add some functionality to make it easier to get insights to such things.

Either:

• adding a dedicated jmap toggle
• or, use a generic approach which can be fed with any command we want to get insights with

If we end up with a sidecar to run such commands, we may need to use https://kubernetes.io/docs/tasks/configure-pod-container/share-process-namespace/

EDIT: We're aiming to just expose a field like additionalSidecars of type []corev1.Container in the HumioCluster.Spec. This will enable advanced use-cases where users can specify the entire container spec for any set of containers that should be added as sidecars to the existing list of containers we already create in the operator implementation.