cp: build: Compile dataset helper

[ko3n1g]

What does this PR do ?

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Summary by CodeRabbit

• Chores
  • Enhanced Docker continuous integration build configuration to include additional dataset-related support files within the container image. These infrastructure improvements strengthen build reliability and consistency, ensuring comprehensive component availability during testing and deployment phases.

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📝 Walkthrough

Walkthrough

Adds two Megatron-LM dataset-related files (datasets/Makefile and datasets/helpers.cpp) to the Docker CI image build context by copying them to /opt/Megatron-Bridge/3rdparty/Megatron-LM/megatron/core/datasets/.

Changes

Cohort / File(s)	Summary
Docker CI Build Context docker/Dockerfile.ci	Added COPY instruction to include datasets/Makefile and datasets/helpers.cpp files into the CI image at the Megatron-LM datasets directory.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• feat: Add dataset compile helper #2236: Introduces runtime compile_helpers() call that depends on the dataset helper sources being present in the Docker image.
• cp: feat: Add dataset compile helper (#2236) #2249: Uses helpers.cpp file that is now being included in the CI Docker image via this change.

Suggested labels

r0.3.0, Run CICD, cherry-pick

Suggested reviewers

• thomasdhc
• maanug-nv

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title references a build-related change for a dataset helper, which aligns with the actual changeset of adding dataset-related files (datasets/Makefile and datasets/helpers.cpp) to the Docker build context, though the wording is somewhat unclear.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Test Results For Major Changes	✅ Passed	PR contains only minor changes: a single line addition to Dockerfile copying dataset-related files into Docker build context. Per custom check criteria, test results documentation is required only for major changes.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ko3n1g/cp/28d7381c7ea9d22c6fdeae911fef591d58fa2d7c

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