Overlays in emep config

[thorbjoernl]

Change Summary

https://aeroval-test.met.no/thlun/pages/maps/?project=emep2024-test&experiment=2024-reporting-test-overlays&station=ALL&mapType=overlay

Related issue number

closes #1473

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

All modified and coverable lines are covered by tests ✅

Project coverage is 78.49%. Comparing base (c972234) to head (3867e4b).
Report is 72 commits behind head on main-dev.

Additional details and impacted files

@@             Coverage Diff              @@
##           main-dev    #1497      +/-   ##
============================================
+ Coverage     78.46%   78.49%   +0.03%     
============================================
  Files           139      140       +1     
  Lines         21124    21299     +175     
============================================
+ Hits          16575    16719     +144     
- Misses         4549     4580      +31     

Flag	Coverage Δ
unittests	78.49% <ø> (+0.03%)	⬆️

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