testing with Slinky/slurm-operator hybrid architecture

It would be great to test Omnia with a slinky/slurm-operator configurated in the [hybrid architecture](https://slinky.schedmd.com/slurm-operator/v1.2.0/concepts/architecture.html#hybridimage.png).

One variation from the hybrid architecture that might be useful in a deployment is for the login nodes to be on bare metal (BM). i.e.:

Start by reading the linked Slinky/slurm-operator hybrid architecture and compare it with Omnia's existing cluster deployment approach. The issue mentions a possible bare-metal login-node variation; done should include a working test of the hybrid setup and confirmation of whether that variation deploys successfully.

Written by the indexing model from the issue text.