feat: add shuffle parameter to train_test_split

[otogamer]

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

What does this PR do?

Fixes #673.

PR review

Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in GitHub issues there's a high chance it will not be merged.

Did you have fun?

Make sure you had fun coding 🙃

[bhimrazy]

LGTM. 🚀
Appreciate your work, @otogamer — looking forward to more amazing contributions!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84%. Comparing base (f739826) to head (e67122b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #675   +/-   ##
===================================
- Coverage    84%    84%   -0%     
===================================
  Files        52     52           
  Lines      7143   7144    +1     
===================================
- Hits       5967   5966    -1     
- Misses     1176   1178    +2     

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[deependujha]

🎉 Thanks a lot for your contribution, @otogamer! Looking forward to more awesome contributions from you in the future! ⚡️

[bhimrazy]

Hi @otogamer!,
If you're not already there, pls feel free to join our LightningAI Discord community — we'd love to have you around!

You're welcome to start any discussions or ask questions in the #litdata channel. Looking forward to collaborating more with you! ⚡