Implement support for SQLAlchemy 2.0

[Vitor-Avila]

SQLAlchemy 2.0 was recently released. When using this version, the CLI throws an error when trying to sync a BQ DB from DBT.

[Vitor-Avila]

This code (and other uses of the sqlalchemy.URL class), doesn't work with the new SQLAlchemy version since it defaults to hide_password: bool = True (reference).

We might need to include .render_as_string(hide_password = False):

return {
        "sqlalchemy_uri": str(
            URL(
                drivername="postgresql+psycopg2",
                username=username,
                password=password,
                host=host,
                port=port,
                database=dbname,
                query=query,
            ).render_as_string(hide_password = False),
        ),
    }