[Slurm] Use `sacct` to retrieve job status when `scontrol show job` does not show the job anymore

**As:** a user
**I want to:** get a job status even if it vanished from `scontrol show job` (after 5min)
**So that:** I can know at least if my job finished successfully or in error

**AC1:** Still use `scontrol` to get job info by default but if not found then try `sacct`
**AC2:** If `sacct` is not configured on a cluster, well set the job status as unknown like it is now
