Add a more generous AwsClient[:states] retry_limit (#675)
Add a more generous AwsClient[:states] retry_limit (#675)

# Description
- This PR doubles the `Aws::States::Client` `retry_limit` from 3 to 6. I want to fiddle with these settings to see if it will help with errors like the dropped `start_executions`.
- We could also create a retry locally around specific API calls, but I would rather use the extensive retry logic built into the SDK already, and I think some retry handling is useful globally.

# Tests
- I restarted and dispatched a sample locally as a sanity test.
chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web