Adding a benchmark for JumpProcesses aggregators

[vyudu]

Checklist

• Appropriate tests were added
• Any code changes were done in a way that does not break public API
• All documentation related to code changes were updated
• The new code follows the
  contributor guidelines, in particular the SciML Style Guide and
  COLPRAC.
• Any new documentation only uses public API

Additional context

Benchmarks some of the jumpprocesses aggregators on some example reaction networks and figure 4/5 in the Sanft/Othmer paper. Not sure if this is the right way to add this. Depends on this PR