Move git-installed deps to cosmodesi optional dependencies

[SBouchard01]

Since git-collected dependencies can't be cached because there is no versioning, those are reinstalled each time we reinstall the package - which can take a significant time, especially for ACM test jobs on GitHub workers. This is especially true for our DESI-related packages, which also have git-collected dependencies.

Luckily, those git-collected dependencies are pre-installed in the cosmodesi NERSC environment, which allows us to create a cosmodesi optional dependency group (like what was done in acm) to avoid installing them in the test environment :)

This PR moves desilike and cosmoprimo (also jax just in case) to this new optional group

[Copilot]

Pull request overview

This PR updates sunbird’s packaging metadata to move several git-installed DESI ecosystem dependencies into a new cosmodesi optional dependency group, aiming to avoid repeated VCS installs (and associated CI time) in environments where those packages are preinstalled.

Changes:

• Removed jax and the VCS-installed cosmoprimo from the base dependencies.
• Added a new cosmodesi optional-dependencies group containing jax, cosmoprimo (VCS), and desilike (VCS).
• Removed desilike from the inference optional-dependencies group.

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