[Task]: Remove datatables dependency in Beam 2.79.0 #40705

What needs to happen?

datatable has not had a release since 2023 and has no wheels for Python 3.13+. Support should be removed from the xgboost model handler suite and the dependency removed so the model handler can be used on later Python versions.

Issue Priority

Priority: 2 (default / most normal work should be filed as P2)

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