Publish standalone `cuda-bindings` packages

[leofang]

The implementation needs to carry out both steps at once:

1. Rename the existing package cuda-python to cuda-bindings
   

   cuda-python/cuda/pyproject.toml

   Line 14 in 797286b

   name = "cuda-python"

2. Add a new package named cuda-python (we just need to add a new setup.py) that depends on cuda-bindings (tracked in Create a slim pyproject.toml for cuda-python #167)