raw=True flag for attribute saving in S&H example

[slayoo]

this addresses the lack of a way to access unaltered super-droped ids reported in #1380

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.30%. Comparing base (ec1f515) to head (303dc30). Report is 129 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1385   +/-   ##
=======================================
  Coverage   84.30%   84.30%           
=======================================
  Files         373      373           
  Lines        9160     9160           
=======================================
  Hits         7722     7722           
  Misses       1438     1438           

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[slayoo]

TODOs:

• [ ] create a test that will fail without this change
• [ ] make the new behaviour controllable from user scope

[AgnieszkaZaba]

Closing since the example that needed this is not parto of PySDM_examples. Reopen if needed.