Move some arm64 a100 runners to arm t4.

[jpascucci-nv]

Description

Closes #3069

Move half the arm a100 runners to t4.

Checklist

• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[coderabbitai]

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⚙️ Run configuration

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• Plan: Enterprise
• Run ID: 3c2f4cce-6834-467a-9985-c9b37473731d

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📥 Commits

Reviewing files that changed from the base of the PR and between 08a42d7 and 1df0131.

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📒 Files selected for processing (1)

• ci/test-matrix.yml

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📝 Summary

Summary by CodeRabbit

• Tests
  • Updated the Linux ARM64 test matrix to use T4 GPUs instead of A100 GPUs for three Python and CUDA combinations: Python 3.10 with CUDA 13.4.2, Python 3.13 with CUDA 13.0.2, and Python 3.14 with CUDA 13.4.2. Other settings for these test configurations remain unchanged.

Walkthrough

The Linux arm64 test matrix now uses T4 GPUs for Python 3.10 with CUDA 13.4.2, Python 3.13 with CUDA 13.0.2, and Python 3.14 with CUDA 13.4.2.

Changes

Arm64 GPU matrix

Layer / File(s)	Summary
Update arm64 GPU assignments ci/test-matrix.yml	Three arm64 Python/CUDA matrix rows now specify T4 instead of A100. Other settings in those rows remain unchanged.

Assessment against linked issues

Objective	Addressed	Explanation
Replace some arm64/A100 matrix rows with T4 rows [#3069]	✅
Update the enterprise runner configuration to use arm64 T4 runners [#3069]	❌	No change to the enterprise runner configuration is included in this PR.

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Priority: ⬇️ Low

Change: Other

Merge Risk: ⚪ Minimal · up to 1df01

The matrix change is mergeable on the available evidence. Confirm Arm64 T4 runner availability during the normal rollout.

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[leofang]

Thanks, Jason! Seems to work now!

[github-actions]

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