Increase version requirements

[squidarth]

Summary

Make a few updates to Truss dependencies here:

• Increase cython version (this was a blocker for some of the TTS work that @het was working on.
• Increase FastAPI & Uvicorn versions. This version change allows us to finally get onto Pydantic 2 (which will help make truss installation easier for users with pydantic 2 installed, who currently cannot install truss).

None of these changes should have backwards incompatible changes, but I will test extensively before rolling this out.

Note that merging this should cause new images to get built, that match the tag

Testing

1. Build a GPU image locally:

$ ./bin/generate_base_images.py --version-tag 0.7.16rc1 --python-version 3.10 --use-gpu y
 --job-type server --push

With this image, then make a separate branch, and bump the util.py file (see main...sshnaker/bump-requirements-on-truss-teset) to match the tag in the generate command.

Run context builder, and then test on dev.

I made a new model, and sent a bunch of requests to it (set concurrency to 10)