Create Workflow Example Ray + cuml on Brev

[ncclementi]

• Develop an example of HPO + RF cuml using Ray, that uses data from S3.
  • poc of of local cuml example with make_classification data https://github.com/ncclementi/ray-rapids-learning/blob/main/rf_tune_example.py

Using Brev:

• Start from a bare instance
• Install things: using conda for simplicity
• Run example via notebooks.
• Ideally we would be able to use nv-dashboard but at the moment it's not working on Brev.