Revert "update dmlc-core (#12129)"

[hcho3]

Description

Reverts #12129

This is to circumvent double free memory error in #12139. The memory error has been inside CSVIter but remained undetected until a recent modification of CSVParser.

Checklist

Essentials

Please feel free to remove inapplicable items for your PR.

• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage:
• Unit tests are added for small changes to verify correctness (e.g. adding a new operator)
• Nightly tests are added for complicated/long-running ones (e.g. changing distributed kvstore)
• Build tests will be added for build configuration changes (e.g. adding a new build option with NCCL)
• Code is well-documented:
• For user-facing API changes, API doc string has been updated.
• For new C++ functions in header files, their functionalities and arguments are documented.
• For new examples, README.md is added to explain the what the example does, the source of the dataset, expected performance on test set and reference to the original paper if applicable
• Check the API doc at http://mxnet-ci-doc.s3-accelerate.dualstack.amazonaws.com/PR-$PR_ID/$BUILD_ID/index.html
• To the my best knowledge, examples are either not affected by this change, or have been fixed to be compatible with this change

Changes

• Revert dmlc-core to last working point

Comments

• This is a temporary measure. We'll need to come back to CSVIter and address memory error. Address Sanitizer reveals double free issues in CSVIter.

[haojin2]

@marcoabreu The build for this PR has passed but the status is not reflected on this page, can you take a look?

[hcho3]

Closing this now. I'll submit a new pull request where individual commits from dmlc-core are cherry-picked.