Re-work the snowflake workflow examples for their new notebooks

[ncclementi]

Snowflake is deprecating their Legacy notebooks and focusing only on the Jupyter based ones, we have these two workflows that are obsolete:

• https://docs.rapids.ai/deployment/stable/examples/rapids-snowflake-cudf/notebook/
  • I think we could easily re-purpose it to use the new jupyter based notebooks.
• https://docs.rapids.ai/deployment/stable/examples/cuml-snowflake-nb/notebook/
  • We are reading data from a snowflake database, and use snowpark which has more nuances, so I'm not sure we want to re-pupose, but maybe we could include something of cudf in the other workflow.

For the record the documentation page is updated, currently on nightly https://docs.rapids.ai/deployment/nightly/platforms/snowflake/