Feature: include load balancer costs into cost calculation

• Type of issue? feature request
• Where do you run it - cloud or metal? Kubernetes or OpenShift? AWS K8s (the Zalando installation)
• Which image of the operator are you using? (not sure how to find this out)
• Are you running Postgres Operator in production? yes

The Operator UI on its "#/list" page shows a list of postgresql cluster managed by the operator, with an estimation of monthly costs.

These costs are calculated based on volume size (+ throughput/IOPs), memory + CPU requests and number of pods.

But there is another contribution to the total costs: The load balancers which are enabled by enableMasterLoadBalancer or enableReplicaLoadBalancer cost (with AWS's prices today) each 21.60 $/month, which (for smaller DBs like the ones in the screenshot) can easily exceed the other costs.

Request: Include the load balancer costs in the cost estimations shown in the #/list page.

Start in ui/app/src/postgresqls.tag.pug around line 230, where the #/list cost estimate is calculated, and review the enableMasterLoadBalancer and enableReplicaLoadBalancer settings described in the administrator load-balancer documentation. Add the applicable AWS load-balancer costs to the displayed estimates and verify that clusters with either setting enabled show the additional monthly cost.