Change retry submit in scheduler to run unless user cancelled a realization

[JHolba]

Currently we retry submit if return code of a job was >128 (a signal killed the job). It would be better if we kept information about user cancellation in the driver and stopped retries based on that instead.

[xjules]

We should write a test which asserts that the job was resubmitted when there was a signal when the job got a signal. The desired behaviour is to always resubmit unless the job was killed by the user / ert.