[JS] Add DataFrame.scanAsync

Add a version of `DataFrame.scan`, `scanAsync` that yields periodically. The yield frequency could be specified either as a number of record batches, or a number of records.

This scan should also be cancellable.

**Reporter**: [Brian Hulette](https://issues.apache.org/jira/browse/ARROW-2410) / @TheNeuralBit

_{**Note**: *This issue was originally created as [ARROW-2410](https://issues.apache.org/jira/browse/ARROW-2410). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}