support epoch in hf pipeline

[aireenmei]

Description

• support multi epoch training in hf pipeline. Multi-epoch is already supported in other pipelines . b/482070325
• migrate data input validations from pyconfig_deprecated.py to types.py
• Fix mdformat for correct numbering and fix numbering in some docs

Tests

Test on a small dataset with 1 epoch, data run out after 21 steps: https://paste.googleplex.com/5202487038574592
Test on the same dataset with 2 epochs, data run out after 42 steps: https://paste.googleplex.com/5516188497084416
Also used this script to test the effects of .repeat() and .shuffle(). The output is as expected.

Checklist

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• I have performed a self-review of my code. For an optional AI review, add the gemini-review label.
• I have necessary comments in my code, particularly in hard-to-understand areas.
• I have run end-to-end tests tests and provided workload links above if applicable.
• I have made or will make corresponding changes to the doc if needed, including adding new documentation pages to the relevant Table of Contents (toctree directive) as explained in our documentation.

[codecov]

Codecov Report

❌ Patch coverage is 8.33333% with 11 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/MaxText/input_pipeline/_hf_data_processing.py	8.33%	9 Missing and 2 partials ⚠️

📢 Thoughts on this report? Let us know!

[aireenmei]

@SamuelMarks could you review the change in .pre-commit-config.yaml?