🐅 Epic: Remove BentoML as a dependency in Ersilia and move to FastAPI

[DhanshreeA]

Summary

We want to get rid of BentoML completely and use FastAPI to serve models. This will potentially help with:

• the dependency hell we run into with BentoML when BentoML upgrades breaking backward compatibility
• and in its current state Ersilia is not using BentoML to its full potential.

Objective(s)

• Development of ersilia-pack to imitate bentoml's packing functionality (🐕 Batch: Ersilia Pack Development #1138)
• API design for the FastAPI app for the model template (🐕 Batch: Design and document endpoints in the new app template within Ersilia Pack #1141)
• Documenting the model API endpoints such that it renders nicely in redoc (🐕 Batch: Design and document endpoints in the new app template within Ersilia Pack #1141)
• Reworking eos-template to reflect the new model template using a FastAPI app (🐕 Batch: New EOS Template #1139)
• Ersilia CLI should have the necessary bindings for both the previous version using BentoML and the new version utilizing FastAPI (🐕 Batch: Make Ersilia CLI work with new Packing strategy #1140)
• Reworking the Dockerfile to build models because this would not require ersilia CLI and only ersilia-pack would be sufficient. (🐈 Task: Docker build for ersilia-pack #1154)
• Modifying the Docker build actions in CI to choose the correct Dockerfile based on the model

Documentation

https://fastapi.tiangolo.com/
https://docs.google.com/presentation/d/1DTMkf7IYauIaZqwtiCd777wMWZXNQ9lnzCM4EqlUFnk/edit?usp=sharing