Replace deprecated models in docs and tutorial workflows

[LasmarKhalifa]

Currently, some docs and workflows on Roast use deprecated models (such as "claude-3-5-haiku-20241022"). As new models come out frequently and old ones get deprecated, it would be useful to:

1. Replace current deprecated models with newer ones
2. Have a way to periodically do a model "cleaning" easily (a perfect use case for a Roast workflow!)

[LasmarKhalifa]

Note: we currently don't have a lot of places where deprecated models are used, but we can only expect the list to grow as we add more docs/workflows and as more models get deprecated. I think most instances of current deprecated models were fixed by https://app.graphite.com/github/pr/Shopify/roast/874