refactor CUDA versions in dependencies.yaml

[jameslamb]

Description

Contributes to rapidsai/build-planning#7.

Proposes splitting the cuda-version dependency in dependencies.yaml out to its own thing, separate from the bits of the CUDA Toolkit this project needs.

Benefits of this change

• prevents accidental inclusion of multiple cuda-version version in environments
• reduces update effort (via enabling more use of globs like "12.*")
• improves the chance that errors like "conda recipe is missing a dependency" are caught in CI

[vyasr]

At first I thought the error here was just a timeout, but it looks like it's caused by a real underlying issue. Are we tracking that anywhere in cugraph? If not, should probably open an issue/ping people on Slack.

[bdice]

@vyasr It looks like #4083 touched some relevant code here. I merged in the upstream to see if that helps.

[jameslamb]

I merged in the upstream to see if that helps.

Thanks for that! Seems like it did help.

Issue is fixed

[bdice]

/merge