[Task]: Create Script Entry Point for Transformation Steps

[acouch]

Summary

We want to create the entrypoint to the ecs task that handles copying data from the legacy Oracle database, running the transformations, and the running the set current opportunities logic in that order. Each of these steps of the process will be implemented as a class derived from the Task class.

Setting up a script with an entrypoint simply requires adding a bit of boilerplate. For example, you can see some of this boilerplate in how we setup the copy-oracle-data command: https://github.com/HHS/simpler-grants-gov/blob/main/api/src/data_migration/copy_oracle_data.py#L53

This should look something like:

@data_migration_blueprint.cli.command(
    "whatever-we-want-to-call-this", help="some help message"
)
@flask_db.with_db_session()
def copy_oracle_data(db_session: db.Session) -> None:
      logger.info("Starting")

      CopyFromLegacyTask(db_session).run()
      TransformOracleDataTask(db_session).run()
      SetCurrentOpportunitiesTask(db_session).run()

     logger.info("Done")

And the command can be run with poetry run flask data-migration whatever-we-want-to-call-this

Acceptance criteria

No response

[acouch]

This is a sub-task: #1858