Fix CI for python cuvs_bench

[benfred]

I'm seeing CI failures due to a missing 'setuptools' on a recent PR https://github.com/rapidsai/cuvs/actions/runs/12363479650/job/34545223389?pr=536 in building the cuvs_bench code.

This seems to be because we were missing some requires in dependencies.yaml. Fix

[bdice]

This seems not quite right. I’ll have a closer look.

[bdice]

The CI failure says:

ValueError: Could not import build backend specified in pyproject.toml's tool.rapids-build-backend table. Make sure you specified the right optional dependency in your build-system.requires entry for rapids-build-backend.

but we already specified that here, I think?

cuvs/python/cuvs_bench/pyproject.toml

Line 7 in b859bc5

"setuptools",

[bdice]

Aha. This occurs in conda package builds, so the dependencies.yaml / pyproject.toml are not used (conda builds call build.sh which uses --no-build-isolation --no-deps). This is occurring because we are missing setuptools in conda/recipes/cuvs-bench/meta.yaml. The proper fix should be the same as this PR from earlier today: rapidsai/dask-cuda#1418

[benfred]

Ahh - thanks @bdice ! Thats a great find - I've applied the same fix in the last commit

[benfred]

/merge