[Bug]: Add a consistent schema format for TypedSchemaTransformProvider

[chamikaramj]

What happened?

In https://github.com/apache/beam/commit/b33a8438ad335b75feec0c5c97e9a728795fc6ff we reverted usage of snake case globally for TypedSchemaTransformProvider.

Creating this to track fixing this forward so that we maintain a consistent schema.

One way forward might be to re-introduce global snake case formatting to TypedSchemaTransformProvider but update the existing Beam provided TypedSchemaTransformProvider that needs to preserve backwards compatibility to use camel-case.

Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

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