Migrate optuna/notebooks/azure-optuna/run_optuna.ipynb to deployment docs

[jacobtomlinson]

Migrate optuna/notebooks/azure-optuna/run_optuna.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

[betatim]

This notebook uses Azure ML spaces. This makes it more relevant to "cloud deployment" than some of the other optuna notebooks. But there might be overlap with the other Azure notebooks. -> I'd vote "maybe" on migrating this.

xref rapidsai/deployment#141 (comment)

[jacobtomlinson]

Maybe is good enough for me!