fix(rust,python): throw an invalid operation exception on performing a sum over a list of strs

[coastalwhite]

Fixes #12935.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.51%. Comparing base (cc2c905) to head (1564636).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16521      +/-   ##
==========================================
- Coverage   81.51%   81.51%   -0.01%     
==========================================
  Files        1410     1410              
  Lines      185063   185069       +6     
  Branches     2983     2982       -1     
==========================================
- Hits       150860   150859       -1     
- Misses      33687    33694       +7     
  Partials      516      516              

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[ritchie46]

Nice one!