Backport to branch(3.11) : Add data loader core key and column utils

[feeblefakie]

This is an automated request for a manual backport of the following:

• Original PR: Add data loader core key and column utils #1771
• Commit to backport: 8279ba2

1. Resolve any conflicts that occur during the cherry-picking process.

git fetch origin &&
git checkout 3.11-pull-1771 &&
git cherry-pick --no-rerere-autoupdate -m1 8279ba2343941d0cc19c07f7d97d620159090e88

2. Push the changes.
3. Merge this PR after all checks have passed.

Thank you!

[brfrn169]

@ypeckstadt It seems like you’ve merged an empty commit in this PR. The comment suggests that the Auto-PR failed to cherry-pick the changes from the original PR, and a manual backport was needed by following the steps in the comment. Could you please follow those steps to backport the changes?

[ypeckstadt]

@brfrn169 My bad I missed the above comments. I will follow those steps.