Update the GLM out-of-sample notebook

[cluhmann]

• Notebook follows style guide https://docs.pymc.io/en/latest/contributing/jupyter_style.html
• PR description contains a link to the relevant issue:
  • a tracker one for existing notebooks (tracker issues have the "tracker id" label)
  • or a proposal one for new notebooks
• Check the notebook is not excluded from any pre-commit check: https://github.com/pymc-devs/pymc-examples/blob/main/.pre-commit-config.yaml

This PR is a follow-up the recent docathon. There are two basic changes here. The first is to re-execute using the current versions of PyMC and PyTensor. The second is to minimize the use of packages PyMC does not depend on (e.g., patsy). There was also at least 1 sklearn function that seemed unnecessary and was removed/replaced.

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📚 Documentation preview 📚: https://pymc-examples--616.org.readthedocs.build/en/616/

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[juanitorduz]

Thank you @cluhmann