Parsing out rendered manifests in Kustomization and HelmRelease objects

[ryphon]

Currently when you apply a Kustomization or HelmRelease, your raw manifests are just the actual Kustomization object, alongside maybe sources, etc.

I think it would be highly valuable to be able to parse out the actual final rendered manifests in an "offline" method. So that one could validate the final set of manifests being applied to the cluster (or do debugging for helm charts and/or kustomizations), almost like just running kustomize build . or helm template .