Add program mode specific report and plot naming and change plot names to pep8 style

Report and plots are named according to program mode/mission file (design, study or requirement) so they are no longer overwritten when running a second mode. Plot names are also adapted to match pep8 style.

added modulesystems_design typebug labels

requested review from @johannes.schneider

assigned to @ellen.seabrooke

enabled an automatic merge when all merge checks for 396882db pass

approved this merge request

merged

mentioned in commit f9b1d3c6