Include retry exhaustion in the Job API for job status

[JonathanSun]

Is your feature request related to a problem? Please describe.
We would like to show the status of a job in our UI when failed/completed, without being sensitive to the number of retries. It's difficult to distinguish a failed job (that is going to retry) vs. a failed job that has exhausted its retries using the Job API. It seems like the status of retries being exhausted is only available via QueueEvents.

Describe the solution you'd like
A field on Job like retriesLeft or retriesExhausted that can be polled to see if the job is going to retry on failure.

Describe alternatives you've considered
Using the QueueEvents API to return the retry status to the UI is more complicated, and does not mix well with polling for job status.

[manast]

A job that is in the failed status has actually exhausted all its retries, otherwise it would be in the delayed status waiting for the next retry.