Allow to recalculate cart prices

[mamhoff]

Summary

This adds a preference that allows implementers to choose to have the order updater recalculate cart prices.

Fixes #6206

Checklist

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.48%. Comparing base (f8779d6) to head (b3b5e56).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6399   +/-   ##
=======================================
  Coverage   89.48%   89.48%           
=======================================
  Files         980      980           
  Lines       20438    20446    +8     
=======================================
+ Hits        18289    18297    +8     
  Misses       2149     2149           

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[tvdeyen]

Long overdue! Thanks