Test Rosenbrock derivative and Hessian by comparing to finitediff

[codecov-commenter]

Codecov Report

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

Comparison is base (e9bebb2) 90.12% compared to head (f84cb51) 90.37%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #420 +/- ## ========================================== + Coverage 90.12% 90.37% +0.25% ========================================== Files 162 162 Lines 19549 19655 +106 ========================================== + Hits 17618 17764 +146 + Misses 1931 1891 -40 ```

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