WIP: [NOT READY FOR REVIEW] split up CUDA-suffixed dependencies in dependencies.yaml

[jameslamb]

Description

Contributes to rapidsai/build-planning#31
Contributes to rapidsai/build-planning#68

Follow-up to #15425.

RAPIDS DLFW builds prefer to build all RAPIDS packages together without CUDA suffixes, leading to the following set of requirements for cudf wheels built there:

• project name must be cudf (not cudf-cu12)
• all dependencies must be unsuffixed (e.g. rmm not rmm-cu12)
• the correct set of dependencies based on CUDA version must be expressed in the wheel metadata (e.g. cubinlinker and ptxcompiler on CUDA 11, pynvjitlink on CUDA 12)

To meet all 3 of those, this proposes decomposing CUDA-suffixed dependencies in dependencies.yaml into two lists... cuda_suffixed="true" and cuda_suffixed="false".

That'd allow DLFW builds to do the following to meet its requirements:

pip wheel \
  -C rapidsai.disable-cuda=true \
  -C rapidsai.matrix-entry="cuda=12.5;cuda_suffixed=false" \
  .

While in here touching this, I've also changed the fallback matrices (the ones used when no CUDA version is supplied) to the CUDA 12 set of dependencies, following @bdice 's suggestion described in rapidsai/build-planning#68.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.