Wrapper to expose S3 objects as named pipes

This script internally uses multiple processes to execute
`aws s3api` command line utility in parallel.
`aws s3api` handles download parallelization etc. so
we reuse it instead of reimplementing it ourselves.
1 job for aws-s3-to-fifo in 4 minutes and 22 seconds (queued for 2 seconds)
Status Job ID Name Coverage
passed pylint #1895752
docker linux amd64