refactor(limited api): add explicit wheel.py-api to pyproject.toml

[gforsyth]

Description

As part of rapidsai/build-planning#42 I added support for building limited API wheels and conda packages.

To enable a RAPIDS-wide bump of the lower-bound of the limited API version we use (currently cp311), the flags that set these options are passed in via environment variables.

This leads us to an issue where local developer builds, either in devcontainers or otherwise, will build without the limited API, unless devs have set an (otherwise unnecessary) environment variable.

So here, I set the py-api version explicitly, so that local builds will always produce limited API wheels and so better reflect what we build and test in CI.

We retain the ability to bump all of RAPIDS to a different cp3xx value because the flag passed in by our scripts overrides the value set in the pyproject.toml. There may be short periods where the flags we are building with and the flags set in pyproject.toml differ, but that should happen infrequently at best.

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📥 Commits

Reviewing files that changed from the base of the PR and between 2797825 and 60a7cd2.

📒 Files selected for processing (1)

• python/cuml/pyproject.toml

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📝 Walkthrough

Summary by CodeRabbit

Release Notes

• Chores
  • Updated build configuration to specify Python API version for wheel distribution.

Walkthrough

Adds a single configuration entry wheel.py-api = "cp311" to the [tool.scikit-build] section in the Python CUDA ML project's build configuration, specifying the Python API version for wheel building operations.

Changes

Cohort / File(s)	Summary
Build Configuration python/cuml/pyproject.toml	Added wheel.py-api = "cp311" configuration key under [tool.scikit-build] section to specify Python API version for wheel building.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding an explicit wheel.py-api configuration to pyproject.toml for limited API support.
Description check	✅ Passed	The description clearly explains the rationale for the change, relating to limited API wheel building and ensuring local developer builds match CI behavior.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[gforsyth]

/merge