Remove epsilon dataset usage for ml_benchmarks

[ethanglaser]

Description

Avoid ChunkedEncodingError / IncompleteRead issues in CI by disabling usage of epsilon dataset

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Checklist:

Completeness and readability

• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes or created a separate PR with updates and provided its number in the description, if necessary.
• Git commit message contains an appropriate signed-off-by string (see CONTRIBUTING.md for details).
• I have resolved any merge conflicts that might occur with the base branch.

Testing

• I have run it locally and tested the changes extensively.
• All CI jobs are green or I have provided justification why they aren't.
• I have extended testing suite if new functionality was introduced in this PR.

[ethanglaser]

http://intel-ci.intel.com/f0bf6601-ce1e-f178-89fb-a4bf010d0e2d

[david-cortes-intel]

@razdoburdin Would it be a problem to remove this dataset?

[razdoburdin]

@razdoburdin Would it be a problem to remove this dataset?

it represents the xgboost cases with large histogram size not fitting in cache, but we can replace it by synthetic data or use preloaded data.