Updating data sync handlers based on mem leak updates

[rpmcginty]

What's in this Change?

Primarily meant to address the following bug - https://alleninstitute.atlassian.net/browse/OCSDV-354

• caching of botocore config
• introducing DataSyncResult and BatchDataSyncResult
  • summarizes data that is transferred
  • allows to conditionally update
• for batch jobs, we add the ability for partial success of transfers (by default this is disabled)

Primarily meant to address the following bug - https://alleninstitute.atlassian.net/browse/OCSDV-354

This also introduces a new approach to gathering results during data sync. Previously the data sync operations returned nothing and the lambda handlers would simply return the requests in the response. For a few reasons, this is not great and so I have introduced a more informative and cohesive result object that summarizes data sync operations based on bytes transferred, files transferred and for the batch case, the number of succeeded and failed tasks.

Connected PRs

• updating data sync models. adding results model aibs-informatics-core#16
• Data Sync Operation updates - mem leak fix and introduction to results response aibs-informatics-aws-utils#18

Testing

• unit tests
• e2e tests in merscope analysis dev