Extend helm chart to optionally include `podMonitor`

[jcpunk]

It would be nice if the helm chart had the ability to easily enable a podMonitor for the postgres clusters via a boolean flag. Similar to what exists within the strimzi operator or cilium would be nice.

[benjaminjb]

I'm not sure I understand the utility, can you say more about your use-case?

I mean: we have a monitoring stack that includes Prometheus config with scrape jobs; BUT maybe you already have a monitoring stack, you just want the scrape configs to put into Prometheus or a PodMonitor (or ServiceMonitor). OK, but if you have a centralized (non-Crunchy) monitoring stack, wouldn't it be easy to use that to create a PodMonitor/ServiceMonitor or update your Scrape Job?

Or, approaching this another way, can you point me to what you're thinking of in regards to strimzi or cilium?