Set up DataSync between Prod Test EFS and Prod Test Public S3

[timcosgrove]

Requirements

We need files to sync from Prod Test's EFS to the Public S3 bucket for Prod test, so that files added via the Drupal file system are available publicly.

Acceptance criteria

Preview Give feedback

1. A Datasync process is set up between Prod Test EFS and Prod Test Public S3
2. Once all files are sync'd, file sync tests are run to learn how long sync of new files should take

Background & implementation details

EFS: https://us-gov-west-1.console.amazonaws-us-gov.com/efs/home?region=us-gov-west-1#/file-systems/fs-1f9ba71e
S3: https://us-gov-west-1.console.amazonaws-us-gov.com/s3/buckets/dsva-vagov-prod-cms-test-files?region=us-gov-west-1&tab=objects

EFS path: all files under docroot/sites/default/files/*
S3 destination path: img/*

Once the sync is set up and the initial sync is complete, we should add files to the Prod Test CMS and track how long they take to end up on S3. Drupal folks on the team can help with identifying where the files will end up on Drupal so we can observe on the S3 end.

[timcosgrove]

closing in favor of #16929