Add advice on configuring Dask

[bouweandela]

Description

Add documentation on how to configure Dask with the default scheduler and for debugging purposes.

Link to documentation: https://esmvaltool--2435.org.readthedocs.build/projects/ESMValCore/en/2435/quickstart/configure.html#dask-default-scheduler-configuration

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Checklist

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• 🧪 The new functionality is relevant and scientifically sound
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• 🧪 and 🛠 Documentation is available
• 🛠 Changes are backward compatible
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.51%. Comparing base (8d3d366) to head (1331d9d).
Report is 40 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2435   +/-   ##
=======================================
  Coverage   94.51%   94.51%           
=======================================
  Files         246      246           
  Lines       14024    14024           
=======================================
  Hits        13255    13255           
  Misses        769      769           

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[schlunma]

Looks great, thanks!!