ci: remove lean CI matrix from pr.yaml

[ramakrishnap-nv]

Removes the lean-ci label mechanism — check-lean-ci, prevent-merge-with-lean-ci, and the conditional branching in compute-matrix-filters. The full CI matrix is now always used on every PR.

This effort is to make default PR CI to be lean at the same time sufficient, rather than adding another flavor.

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[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: 64f258e6-5220-456f-9d38-c773ebfca9d4

📥 Commits

Reviewing files that changed from the base of the PR and between 0549423 and 100d6e8.

📒 Files selected for processing (1)

• .github/workflows/pr.yaml

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📝 Walkthrough

Walkthrough

The PR removes lean-ci gating from the PR workflow, simplifies compute-matrix-filters to emit only the remaining wheel-related filters, and updates conda and cuopt wheel test jobs to stop depending on removed matrix filters.

Changes

PR workflow matrix cleanup

Layer / File(s)	Summary
Lean-ci gating and filter outputs .github/workflows/pr.yaml	pr-builder drops the lean-ci job dependencies, and compute-matrix-filters now emits only the remaining wheel-related filter outputs.
Conda job wiring .github/workflows/pr.yaml	conda-cpp-tests, conda-python-build, and conda-python-tests drop compute-matrix-filters from needs, and the conda test jobs remove their matrix_filter inputs.
Cuopt wheel test wiring .github/workflows/pr.yaml	wheel-tests-cuopt drops compute-matrix-filters from needs and removes its matrix_filter input.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• NVIDIA/cuopt#1457: Also changes .github/workflows/pr.yaml around compute-matrix-filters and wheel matrix filter wiring.

Suggested reviewers

• jameslamb

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main CI change by removing the lean CI matrix from pr.yaml.
Description check	✅ Passed	The description matches the changeset and accurately describes removing the lean-ci branching and jobs.
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
• Commit unit tests in branch ci/remove-lean-ci-matrix

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[github-actions]

CI Test Summary

✅ All 31 test job(s) passed.