Please check #17181 for more context on the code changes.

This PR, currently work-in-progress, closes BEAM-14035 by creating:

• BigQuerySchemaTransformReadConfiguration - Configuration for reading from BigQuery.
• BigQuerySchemaTransformReadProvider - an implementation of TypedSchemaTransformProvider
• BigQuerySchemaTransformWriteConfiguration - Configuration for writing to BigQuery.
• BigQuerySchemaTransformWriteProvider - an implementation of TypedSchemaTransformProvider

Note I created https://issues.apache.org/jira/browse/BEAM-14168 to handle additional BigQueryIO read and write parameters for a future PR. Additionally, I created https://issues.apache.org/jira/browse/BEAM-14260 to add additional integration tests in a future PR.

I would like to request to following to review this PR:
@angoenka

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