fix:refactored pydantic extension registration

[zilto]

The merge of #1121 broke Hamilton for users of pydantic<2.0 because the extension was checking for importing Pydantic but had no guard for from pydantic import TypeAdapter a feature added in 2.0. Simply having pydantic<2.0 in your environment broke Hamilton even if not using Pydantic in the Hamilton code because of eager/greedy plugin registration. Problem was larger because registration don't follow the main hamilton/plugins/XX_extensions mechanism.

Change

• moved the code to hamilton/plugins/pydantic_extensions so that autoload can be disabled or enabled selectively
• added a try/except for pydantic 2.0 feature with a helpful message
• changed message from the logger to raise to follow convention amongst plugin

Otherwise, the SchemaValidatorIbis under hamilton.plugins.ibis_extensions is a more modern and safer approach to follow than the older hamilton.data_quality.pandera_validators alternative.

Testing

• manually check if able to from hamilton import driver and build a Driver for: no pydantic installed, pydantic==1.10 installed, and latest pydantic installed.