Synchronise our `package.py` with version in spack upstream

[fangohr]

There is some divergence (use make diff) - we should integrate changes from upstream into our package.py and then create one or more merge requests to bring our changes to upstream.

Probably best to do this before we introduce additional changes.

[iamashwin99]

changes in upstream that we don't have:

• https://github.com/spack/spack/pull/41747
• https://github.com/spack/spack/pull/41003
• https://github.com/spack/spack/pull/41919
• https://github.com/spack/spack/pull/40685 Changes not in upstream but here:
• https://github.com/fangohr/octopus-in-spack/pull/101
• https://github.com/fangohr/octopus-in-spack/pull/90

I would say its easier to push our changes upstream and then synchronise. so send two MRs upstream:

• Add hash for octopus 14 and https://github.com/fangohr/octopus-in-spack/pull/101 ( done at https://github.com/spack/spack/pull/43160)
• push changes in https://github.com/fangohr/octopus-in-spack/pull/90 (done at https://github.com/spack/spack/pull/43161)

and then merge the changes back here.

I guess since Im not a maintainer of the package, I didn't get notified when there were changes to the octopus package.

[iamashwin99]

After the synchronisation, we could add a CI that periodically checks for the make diff target and post the status as a badge