Add retry logic to RestService

[rayokota]

Add retry logic to RestService. We implement exponential backoff with full jitter per https://aws.amazon.com/blogs/architecture/exponential-backoff-and-jitter/

[confluent-cla-assistant[bot]]

:tada: All Contributor License Agreements have been signed. Ready to merge.
_{Please push an empty commit if you would like to re-run the checks to verify CLA status for all contributors.}