Avoid --find-links in wheel jobs

[jameslamb]

Description

Contributes to https://github.com/rapidsai/build-planning/issues/69 Contributes to https://github.com/rapidsai/build-planning/issues/33

Proposes a stricter pattern for passing a pylibcugraph wheel from the wheel-build-cpp job that produced it into the wheel-build-python job wanting to use it (as a build dependency of cugraph). This change improves the likelihood that issues with the pylibcugraph wheels will be caught in CI.

Notes for Reviewers

See https://github.com/rapidsai/rmm/pull/1586 and https://github.com/rapidsai/build-planning/issues/69#issuecomment-2174556118 for details on how I tested this approach.