Retrieve partial job results from an unsuccessful batch job

[bharat-thotakura]

What is happening?

Following PR #468, results from a successful sub-job in qss are stored and can be retrieved even if the overarching job was unsuccessful. It would be a helpful feature to more easily retrieve successful sub-job results immediately (even if some sub-jobs are running) by passing some method-type argument or flag (see https://github.com/SupertechLabs/client-superstaq/pull/468#discussion_r1237388397) to result().

What are the current alternatives?

With #468, calling job.result().get_counts(n) for a successful sub-job-n could give you partial job results.

Any additional context?

See discussion in PR #468.