References ACCESS-NRI/access-spack-packages#295
Background
Spack has split out their builtin package repo from spack core to it's own spack/spack-packages repository. We want a fork of this repository for our own modifications if required, and are thinking of calling it access-nri/upstream-spack-packages.
This means that we have to change the name of our access-nri/spack-packages repository to something like access-nri/access-spack-packages for consistency.
What This Means
We need to update the MDR config/versions.json schema to support either the original spack-packages or a combination of access-spack-packages+upstream-spack-packages, but not both.