Results 3 issues of Rush

and updated tests to match ## Description Fixes #2158. ## TODOs Read the [Gruntwork contribution guidelines](https://gruntwork.notion.site/Gruntwork-Coding-Methodology-02fdcd6e4b004e818553684760bf691e). - [x] Update the docs. (Docs already show this desired state) - [x] Run...

Added fetching subresources. The filtering mechanism is unchanged since the syntax is: ``` rbac-tool gen --deny-resources=clusterrolebindings.rbac.authorization.k8s.io,clusterroles.rbac.authorization.k8s.io,pods/exec. --allowed-verbs=get,list,watch ```

Added loadBalancerIP field to pgPrimary and pgBouncer, but not pgReplicas per request in ticket: K8SPG-188

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