Added derivative and Hessian for Picheny test function

[codecov-commenter]

Codecov Report

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

Comparison is base (544732b) 90.99% compared to head (10b4efb) 91.30%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #445 +/- ## ========================================== + Coverage 90.99% 91.30% +0.31% ========================================== Files 162 162 Lines 20413 21162 +749 ========================================== + Hits 18574 19322 +748 - Misses 1839 1840 +1 ```

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