bench: add custom constraint tests with hessian=true

[franckgaga]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.50%. Comparing base (0bc9ebf) to head (7a6923a).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #284   +/-   ##
=======================================
  Coverage   98.50%   98.50%           
=======================================
  Files          28       28           
  Lines        4831     4831           
=======================================
  Hits         4759     4759           
  Misses         72       72           

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