BentoML

It worked after pip installing pydantic. I thought it is automatically imported.

```% bentoml env
`bentoml`: 1.0.7
`python`: 3.10.6
`platform`: macOS-10.16-x86_64-i386-64bit
`uid:gid`: 501:20
`conda`: 22.9.0
`in_conda_env`: True```

Hi there, BentoML doesn’t ship with pydantic. If you want to use pydantic, we did mention here in our docs <https://docs.bentoml.org/en/latest/reference/api_io_descriptors.html#structured-data-with-json>

This PR will introduce the option to add pydantic along with bentoml <https://github.com/bentoml/BentoML/pull/3114>

```pip install bentoml[io-json]```