MNT: Refactor Parallel MonteCarlo and Stochastic Seeding

[phmbressan]

Pull request type

• Code maintenance (refactoring, formatting, tests)

Checklist

• Tests for the changes have been added (if needed)
• Docs have been reviewed and added / updated
• Lint (black rocketpy/ tests/) has passed locally
• All tests (pytest tests -m slow --runslow) have passed locally
• CHANGELOG.md has been updated (if relevant)

Current behavior

Enter text here...

New behavior

Enter text here...

Breaking change

• Yes
• No

Additional information

Enter text here...

[codecov]

Codecov Report

Attention: Patch coverage is 29.26829% with 87 lines in your changes missing coverage. Please review.

Project coverage is 74.93%. Comparing base (049276d) to head (26f692e).

Files	Patch %	Lines
rocketpy/simulation/monte_carlo.py	21.62%	87 Missing ⚠️

Additional details and impacted files

@@                     Coverage Diff                     @@
##           enh/parallel_montecarlo     #649      +/-   ##
===========================================================
+ Coverage                    74.16%   74.93%   +0.77%     
===========================================================
  Files                           81       81              
  Lines                        10080     9976     -104     
===========================================================
  Hits                          7476     7476              
+ Misses                        2604     2500     -104     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Gui-FernandesBR]

Outstanding work. Code is much cleaner now, we really appreciate your effort.

I look forward to seeing this feature being released