[FEA]: Setup CI job to automate testing with CuPy

[jrhemstad]

Is this a duplicate?

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Area

Infrastructure

Is your feature request related to a problem? Please describe.

As a CCCL maintainer, I want to be sure we aren't breaking important users like CuPy that effectively exposes Thrust and CUB to Python.

However, we've had several breakages in just the last few months, e.g., #1493

Describe the solution you'd like

We should setup either a nightly or per-PR CI job that runs the CuPy build against the latest CCCL code to make sure we're catching things that break.

Describe alternatives you've considered

No response

Additional context

No response

[leofang]

cc: @kmaehashi for vis