EARLINET cloud filtering

[lewisblake]

Change Summary

Implement the different types of cloud filtering provided by different EARLINET stations.

Related issue number

Close #1310

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

[lewisblake]

Blocked by #1311

[codecov]

Codecov Report

Attention: Patch coverage is 40.74074% with 16 lines in your changes missing coverage. Please review.

Project coverage is 78.97%. Comparing base (89b9921) to head (9e48af9).
Report is 11 commits behind head on main-dev.

Files	Patch %	Lines
pyaerocom/aeroval/experiment_output.py	9.09%	10 Missing ⚠️
pyaerocom/aeroval/coldatatojson_engine.py	0.00%	3 Missing ⚠️
pyaerocom/aeroval/coldatatojson_helpers.py	50.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           main-dev    #1315      +/-   ##
============================================
- Coverage     79.00%   78.97%   -0.03%     
============================================
  Files           136      136              
  Lines         20797    20812      +15     
============================================
+ Hits          16430    16436       +6     
- Misses         4367     4376       +9     

Flag	Coverage Δ
unittests	78.97% <40.74%> (-0.03%)	⬇️

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[jgriesfeller]

approved, but CI has not finished yet. Merge when CI has passed