Export single leaf partition into a new sorted parquet file

[ab295382]

Background

Create the code which will run in an ECS job to export the files for a single leaf partition.

Parent issue

• First version of bulk export capability #3446

Description

The code will read the export message from a queue, find all of the files from a single leaf partition, compact them into 1 file, sort the data and save a new parquet file in S3.