PostgresML Auto Configuration

[usrivastava92]

trafficstars

This pull request adds AutoConfiguration for PostgresML.

Checklist:

• Sign the contributor license agreement ✅
• Rebase your changes on the latest main branch and squash your commits ✅
• Add/Update unit tests as needed ✅
• Run a build and make sure all tests pass prior to submission ✅

Fixes #242