Improve Helm-Templating

Context

Customers using Helm aren't able to utilise the `helm lookup` command, as Argo currently runs `helm template`. This is often used when needing to edit/update resources that are created by (and therefore somewhat managed by) OpenShift - often called patching.

Feedback from the field:
 
there is a feature in Helm where you can perform lookups on the cluster 
but argocd performs a {{helm template }}to render templates
and the helm lookup command doesn't allow that
This looks a bit like a antipattern and we have this Operator as a workaround:
https://github.com/redhat-cop/patch-operator