Propagate training arguments to job when Experiment.set_training_args is called

Fixes #492 (closed) .

MR description

TO_BE_FILLED_BY_MR_CREATOR

Developer Certificate Of Origin (DCO)

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# This file is originally part of Fed-BioMed
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• if modified researcher (eg new attributes in classes) check if breakpoint needs update (breakpoint/load_breakpoint in Experiment(), save_state/load_state in aggregators, strategies, secagg, etc.)