Max backoff/elapsed time

Similar config as this: https://pkg.go.dev/github.com/cenkalti/backoff/v4#WithMaxElapsedTime
The limit of the time that can be spent per request including all retries and delays.
I understand that this goal can be achieved using context timeout, but it's often easier to limit requests to the client on the initialization level instead of passing it to the caller.
The setting itself can conflict with `RetryMax`, assuming that both of them decide when to stop, but logically I would expect quitting by the first one to reach the boundary. In other words, either maximum retries exceeded, or max backoff time reached the limit.