Add script for benchmarking simulators with different parameters

[sgreenbury]

Closes #454.

This PR adds for benchmarking:

• scripts (python and bash for parallel runs)
• plotting

It might work well to include a version of this to be run by github actions at regular intervals.

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
autoemulate/experimental/simulations
__init__.py
flow_problem.py					50-71
Project Total

This report was generated by python-coverage-comment-action

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Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.27%. Comparing base (cecf95d) to head (2ca6acc).
⚠️ Report is 40 commits behind head on main.

Files with missing lines	Patch %	Lines
...toemulate/experimental/simulations/flow_problem.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #621      +/-   ##
==========================================
+ Coverage   80.20%   80.27%   +0.06%     
==========================================
  Files         155      154       -1     
  Lines       11132    11166      +34     
==========================================
+ Hits         8928     8963      +35     
+ Misses       2204     2203       -1     

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[radka-j]

Could we include in the benchmark performance of the main AutoEmulate (test model performance given different N simulated datapoints but otherwise keeping the default AE settings).