switch from 'cuda-python' to specific components (e.g. 'cuda-bindings')

[jameslamb]

Description

Contributes to rapidsai/build-planning#285

cuda-python is a metapackage and sometimes pulls in components that RAPIDS libraries don't need. This PR is part of a series dropping direct use of cuda-python in favor of depending only on those specific components.

• drops dependency on cuda-python
• adds explicit dependencies on components:
  • cuda-bindings >=12.9.2,<13.0 (CUDA 12), cuda-bindings >=13.0.1,<14.0 (CUDA 13)
• adds explicit testing of oldest cuda-bindings in CI

Notes for Reviewers

Why these specific bounds?

• these roughly match what we were getting with cuda-python
• worked through finding compatible ranges in switch from 'cuda-python' to specific components (e.g. 'cuda-bindings') rapidsai/rmm#2460 (comment)
• cuda-bindings major version follows the CTK major version, so kept a ceiling just like we currently have for cuda-python

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[coderabbitai]

📝 Walkthrough

Walkthrough

This PR replaces the cuda-python dependency with cuda-bindings across conda environment lockfiles, conda recipes (pylibraft, raft-dask), dependencies.yaml, and pyproject.toml, preserving version constraints for CUDA 12.x and 13.x. It also updates ci/test_python.sh to add a dependencies matrix parameter and broaden the copyright notice.

Changes

cuda-python to cuda-bindings migration

Layer / File(s)	Summary
Central dependency specification dependencies.yaml	Adds an "oldest" dependencies specific matrix pinning cuda-bindings versions by CUDA major, and swaps depends_on_cuda_python's package to cuda-bindings with matching version ranges.
Conda environment lockfiles conda/environments/all_cuda-129_arch-aarch64.yaml, conda/environments/all_cuda-129_arch-x86_64.yaml, conda/environments/all_cuda-133_arch-aarch64.yaml, conda/environments/all_cuda-133_arch-x86_64.yaml	Replaces cuda-python entries with cuda-bindings at matching version ranges (12.9.2/<13.0 and 13.0.1/<14.0).
Conda recipes conditional dependencies conda/recipes/pylibraft/recipe.yaml, conda/recipes/raft-dask/recipe.yaml	Changes CUDA-major-conditional build.host and build.run requirements from cuda-python to cuda-bindings, preserving version ranges.
pylibraft pyproject.toml dependency python/pylibraft/pyproject.toml	Updates [project].dependencies and [tool.rapids-build-backend].requires from cuda-python>=13.0.1,<14.0 to cuda-bindings>=13.0.1,<14.0.
CI test script matrix and header ci/test_python.sh	Adds a dependencies=${RAPIDS_DEPENDENCIES} parameter to the --matrix argument and broadens the copyright notice.

Estimated code review effort: 2 (Simple) | ~10 minutes

Related PRs: None identified.

Suggested labels: dependencies, conda

Suggested reviewers: None identified.

🐰 A rabbit hops through YAML fields anew,
Swapping python for bindings, tried and true,
Twelve or thirteen, the CUDA major sings,
Recipes, envs, and toml all take their wings,
A tidy hop, and the dependency's through!

🚥 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.
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 reflects the main change from cuda-python to cuda-bindings and other explicit components.
Description check	✅ Passed	The description matches the change set, explaining the dependency swap and added oldest-version CI.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[jameslamb]

/merge