Use corpusState only for guiding the user

[arildm]

If I run a job and there are errors, and then I change the config to be invalid, then the job error message is not visible.

The JobStatus component is now using isFailed from useCorpusState to determine if sparv_output should be shown. The corpus state should only be used to give the user hints on what can be the next expected step. There may be more instances where it's used otherwise.