Helm. User deployments should use templates

[FRVisser]

User deployments should use templates instead of values.yaml. Currently, the user deployments are defined in values.yaml

This against the principle that value files should be simple value listing. This deployments array is in essence templating without any template capabilities. As value replacement isn't available in (at least in ArgoCD) values.yaml, there is no way to have simple parameter tuning between environments and we are forced to copy container configuration in each values.yaml variant.

This is what helm templating is for!