[Lake][Data Quality] Add pydantic to validate schema at the lake-level

[idiom-bytes]

Background / motivation

The current table schemas use types but are poorly validated. We also can't leverage validation wrappers because it's just using a generic type.

Rather: let's implement a validation tool like pydantic to validate data through our system, and in our lake

DoD

• Update table schema definitions to use pydantic
• Update lake validate cli to validate lake schema vs. expected schema

[idiom-bytes]

We're not going to do the pydantic working any longer, since we updated our schema and tables recently