Sometimes run with and without MABWiser

[N-Wouda]

This PR:

• Closes Run w/o MABwiser in the CI #163.
• Adds and passes relevant tests.
• Has well-formatted code and documentation.

Notes:

• It is essential that you add a test when making code changes.
  This keeps the code coverage level up, and helps ensure the changes work as intended.
• When fixing a bug, you must add a test that would produce the bug in the master branch, and then show that it is fixed with the new code.
• New code additions must be well formatted. Changes should pass the pre-commit workflow, which you can set up locally using pre-commit.
• Docstring additions must render correctly, including escapes and LaTeX.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.73%. Comparing base (a3631f1) to head (503b7df).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #176      +/-   ##
==========================================
+ Coverage   99.46%   99.73%   +0.26%     
==========================================
  Files          30       30              
  Lines         745      745              
==========================================
+ Hits          741      743       +2     
+ Misses          4        2       -2     

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