Defines a behaviour to implement retry backoff strategies.

See https://aws.amazon.com/blogs/architecture/exponential-backoff-and-jitter/

Implemented strategies are:

• Attempt.Retry.Backoff.None which has no backoff delay. Speed of execution will be gated only by the configured token bucket

• Attempt.Retry.Backoff.Exponential which implementd an exponential backoff to a maximum of 500ms

• Attempt.Retry.Backoff.ExponentialFullJitter which randomises the backoff time from the exponential backoff to the maximum backoff

• Attempt.Retry.Backoff.ExponentialDecorrelatedJitter which randomises the backoff between zero and a time calculated based on the last delay time

See the relevant module for more information. The default backoff strategy is Attempt.Retry.Backoff.None.