Design Helm + Kustomize configuration structure

Scope

This issue is part of a bigger development effort described in detail by its epic. The scope of this issue is to design how the Configuration structure to support Helm + Kustomize will look like.

A draft set of details is already present in the parent epic

Notes

• We should keep in mind that we will likely develop first Helm support and then add Kustomize on top of it.
• See &7938 (closed)