Pin DCGM version for a4xmax

[saumyasharma03]

Pin DCGM version for A4XMax
Completed NCCL testing, DCGM diagnostics level 1, checked nvidia-dcgmi status, nvidia smi and other basic slurm commands.

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• Test all changes with pre-commit in a local branch #
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• Add or modify unit tests to cover code changes
• Ensure that unit test coverage remains above 80%
• Update all applicable documentation
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[gemini-code-assist]

Summary of Changes

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This pull request stabilizes the A4XMax deployment environment by explicitly pinning DCGM package versions. It also improves the robustness of the deployment automation by adjusting how packages are marked for holding, ensuring compatibility with version-specific package strings.

Highlights

• Version Pinning: Pinned the DCGM (Datacenter GPU Manager) packages to version 1:4.6.0-1 for the A4XMax configuration to ensure environment consistency.
• Apt-mark adjustment: Updated the package holding logic to correctly parse package names by splitting the version string, ensuring that pinned packages are handled properly during deployment.

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[gemini-code-assist]

Code Review

This pull request updates the a4xmax-bm-slurm-blueprint.yaml blueprint to pin specific versions (1:4.6.0-1) for the datacenter-gpu-manager packages (cuda13, dev, and the newly added core). Additionally, it updates the apt-mark hold task to split the package name from its version string using item.split('=')[0] to ensure the package hold is applied correctly. There are no review comments, and I have no additional feedback to provide.