Reschedule trial when it was based on an enqueued trial

[PhilipMay]

https://github.com/PhilipMay/mltb/blob/2d8c6fe07e7d64694ee7835e3e46774cced89dde/mltb/omlflow.py#L279

If a trial fails with an error it could be rescheduled back to optuna. But with an option for "n_retries" to avoid endless retries.