Test GH200 runners

[bdice]

Contributes to https://github.com/rapidsai/build-infra/issues/376

This PR tests GH200 runners. Do not merge.

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[bdice]

/ok to test

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: b4abc3a1-093f-4990-9f6d-6e15f7a9dd3d

📥 Commits

Reviewing files that changed from the base of the PR and between a3aad10 and 4fbf4a9.

📒 Files selected for processing (4)

• .github/workflows/build.yaml
• .github/workflows/pr.yaml
• .github/workflows/test.yaml
• .github/workflows/trigger-breaking-change-alert.yaml

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📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated several CI, PR, test, and alert workflows to use a newer shared workflow reference.
  • No changes were made to build steps, triggers, job inputs, or test behavior.

Walkthrough

GitHub Actions workflows now reference reusable workflows from @test-gh200 instead of @main across build, PR, test, and breaking-change alert jobs. Job wiring, inputs, triggers, and dependencies remain unchanged.

Changes

Reusable workflow ref updates

Layer / File(s)	Summary
Build refs /.github/workflows/build.yaml	Build jobs switch their reusable-workflow uses: references from @main to @test-gh200.
PR and test refs /.github/workflows/pr.yaml, /.github/workflows/test.yaml	PR and test jobs switch their reusable-workflow uses: references from @main to @test-gh200.
Alert ref /.github/workflows/trigger-breaking-change-alert.yaml	The breaking-change alert job switches its reusable-workflow reference from @main to @test-gh200.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• rapidsai/rmm#2435: Also changes .github/workflows/trigger-breaking-change-alert.yaml and the reusable workflow invocation used by that job.
• rapidsai/rmm#2453: Also updates GitHub Actions workflow uses: references to point at a different reusable-workflow ref.

Suggested labels

improvement

Suggested reviewers

• KyleFromNVIDIA
• wence-

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: updating workflows to test GH200 runners.
Description check	✅ Passed	The description is directly related to the workflow changes and the GH200 runner test purpose.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[bdice]

/ok to test

[bdice]

/ok to test 5e4c5e2