CI: Migrate custom jobs to RTX PRO 6000

[bdice]

Migrates custom amd64 CI jobs from L4 to RTX PRO 6000 runners. This change helps rebalance CI capacity and uses the fastest hardware available for these jobs.

Documentation builds and ARM64 jobs remain on L4.

xref: rapidsai/build-planning#322

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📥 Commits

Reviewing files that changed from the base of the PR and between b86f970 and 0d6c22e.

📒 Files selected for processing (2)

• .github/workflows/pr.yaml
• .github/workflows/test.yaml

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📝 Summary

Summary by CodeRabbit

• Chores
  • Updated the hardware used for notebook testing to newer RTX PRO 6000 GPU nodes.
  • Applied the updated GPU configuration across pull request and test workflows.

Walkthrough

The notebook test jobs in the pull-request and test workflows now request gpu-rtxpro6000-latest-1 nodes instead of gpu-l4-latest-1.

Changes

Notebook test runner

Layer / File(s)	Summary
Update notebook test GPU nodes .github/workflows/pr.yaml, .github/workflows/test.yaml	Both notebook test workflows now use gpu-rtxpro6000-latest-1 nodes.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 0d6c2

Notebook test workflows now run amd64 jobs on RTX PRO 6000 runners instead of L4 runners. The two workflow updates are consistent, with no current merge-readiness risk identified.

Suggested reviewers: jameslamb, kylefromnvidia

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.
Title check	✅ Passed	The title clearly summarizes the main change: migrating custom CI jobs from L4 runners to RTX PRO 6000 runners.
Description check	✅ Passed	The description directly explains the runner migration, its purpose, and the jobs that remain on L4 runners.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests

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