[Task]: TypedSchemaTransformProvider should generate Schema field names with lower_snake_case convention

[ahmedabu98]

What needs to happen?

TypedSchemaTransformProvider takes advantage of DefaultSchema and AutoValueSchema to convert an AutoValue config object to a Row.
AutoValueSchema is a GetterBasedSchemaProvider which simply infers names from an object's getter methods. The end result is a Row with field names in lowerCamelCase convention.

Since SchemaTransforms are intended for external (ie. non-Java) languages, we want to generate field names that are in lower_snake_case convention. Preferably, this would be done directly in TypedSchemaTransformProvider.

P.S. TypedSchemaTransformProvider's configFromRow() method should also be updated to accept a row with snake_case field names.

Issue Priority

Priority: 3 (nice-to-have improvement)

Issue Components

• Component: Python SDK
• Component: Java SDK
• Component: Go SDK
• Component: Typescript SDK
• Component: IO connector
• Component: Beam YAML
• Component: Beam examples
• Component: Beam playground
• Component: Beam katas
• Component: Website
• Component: Spark Runner
• Component: Flink Runner
• Component: Samza Runner
• Component: Twister2 Runner
• Component: Hazelcast Jet Runner
• Component: Google Cloud Dataflow Runner