Add a benchmark for 'getJacobian'

[marioprats]

Description

I'd like to evaluate some future changes to getJacobian that should speed-up the computation. The first step is to measure performance as it is now. This change adds a benchmark for getJacobian. This is the current output in my system.

-----------------------------------------------------------
Benchmark                  Time             CPU   Iterations
------------------------------------------------------------
BM_MoveItJacobian        425 ns          426 ns      1585349

Checklist

• Required by CI: Code is auto formatted using clang-format
• Extend the tutorials / documentation reference
• Document API changes relevant to the user in the MIGRATION.md notes
• Create tests, which fail without this PR reference
• Include a screenshot if changing a GUI
• While waiting for someone to review your request, please help review another open pull request to support the maintainers

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01% ⚠️

Comparison is base (3e5af1b) 50.73% compared to head (acb8c53) 50.72%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2326      +/-   ##
==========================================
- Coverage   50.73%   50.72%   -0.01%     
==========================================
  Files         386      386              
  Lines       31958    31958              
==========================================
- Hits        16212    16207       -5     
- Misses      15746    15751       +5     

see 2 files with indirect coverage changes

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