[CI] Spectral clustering n_clusters test fails under oldest dependencies #8719

Summary

The single-GPU cuML accel integration test for spectral clustering with four clusters fails its adjusted Rand score assertion.

Failing test/component: test_spectral_clustering_n_clusters[4]

Failure observed in:

• https://github.com/NVIDIA/cuml/actions/runs/36581940474/job/109458702035 (PR Fix Normalizer parameter cloning in ColumnTransformer #8580)

Environment

• OS: Rocky Linux 8, amd64
• Python version: 3.11
• CUDA version: 12.2.2
• GPU: H100
• Dependencies: oldest-deps; earliest-driver

Test Details

• Test file: python/cuml/cuml_accel_tests/integration/test_spectral_clustering.py
• Test name: test_spectral_clustering_n_clusters[4]
• Error message:

  File "python/cuml/cuml_accel_tests/integration/test_spectral_clustering.py", line 44
    assert adjusted_rand_score(y_true, y_pred) > 0.8
  AssertionError: assert 0.6312665682664412 > 0.8
  

Root Cause Analysis