Migrate databricks/notebooks/rapids_airline_hyperopt.ipynb to deployment docs

[jacobtomlinson]

Migrate databricks/notebooks/rapids_airline_hyperopt.ipynb to deployment docs.

See #203 (comment) for detailed migration instructions.

Tasks

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1. Decide if notebook should be migrated and add "migrate: X" label (if no also close this issue)
2. Test if notebook works
3. Fix up anything that needs changing
4. Ensure notebook has good title, description and metadata tags in the first cell
5. Replace deployment instructions with links to docs pages
6. Copy notebook into a new folder into deployment docs examples
7. Copy any supporting files to the folder
8. Add notebook to examples toctree
9. Make PR to deployment docs repo

[jacobtomlinson]

@skirui-source is currently writing up some Databricks deployment instructions in rapidsai/deployment#92.

This notebook doesn't have much about deployment in, so it would be great to add a little pre-amble about launching on Databricks and link to the page @skirui-source is working on.

[betatim]

I'll take a look at this