MDA8 fix

[thorbjoernl]

Change Summary

Resolves a number of issues with mda8 calculation, now with an demo that works:

• https://aeroval-test.met.no/thlun/pages/evaluation/?project=mda8&experiment=mda8-test&parameter=vmro3mda8&station=ALL&frequency=daily#

Related issue number

NA (See chat)

Checklist

• Start with a draft-PR
• The PR title is a good summary of the changes
• PR is set to AeroTools and a tentative milestone
• Documentation reflects the changes where applicable
• Tests for the changes exist where applicable
• Tests pass locally
• Tests pass on CI
• At least 1 reviewer is selected
• Make PR ready to review

[codecov]

Codecov Report

Attention: Patch coverage is 78.57143% with 3 lines in your changes missing coverage. Please review.

Project coverage is 79.32%. Comparing base (b1fa238) to head (2dad9c7).
Report is 447 commits behind head on main-dev.

Files with missing lines	Patch %	Lines
pyaerocom/colocation/colocator.py	66.66%	2 Missing ⚠️
pyaerocom/aeroval/experiment_output.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           main-dev    #1251      +/-   ##
============================================
- Coverage     79.33%   79.32%   -0.02%     
============================================
  Files           133      133              
  Lines         20289    20316      +27     
============================================
+ Hits          16096    16115      +19     
- Misses         4193     4201       +8     

Flag	Coverage Δ
unittests	79.32% <78.57%> (-0.02%)	⬇️

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[lewisblake]

Notice how in the bottom left panel and in the tab at the top is says O3 although the three other panels say MDA8. We want to make sure the correct time series is being shown.

[lewisblake]

🚀