Use aerovaldb for writing json in ExperimentOutput

[thorbjoernl]

Change Summary

This PR changes ExperimentOutput to use aerovaldb to write output data from.

Related issue number

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
• Pin aerovaldb to a fixed tag.
• Make PR ready to review

[codecov]

Codecov Report

Attention: Patch coverage is 95.65217% with 1 line in your changes missing coverage. Please review.

Project coverage is 79.34%. Comparing base (2dad9c7) to head (816b2cc).
Report is 509 commits behind head on main-dev.

Files with missing lines	Patch %	Lines
pyaerocom/aeroval/experiment_output.py	95.65%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           main-dev    #1193      +/-   ##
============================================
+ Coverage     79.32%   79.34%   +0.02%     
============================================
  Files           133      133              
  Lines         20316    20421     +105     
============================================
+ Hits          16115    16204      +89     
- Misses         4201     4217      +16     

Flag	Coverage Δ
unittests	79.34% <95.65%> (+0.02%)	⬆️

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[thorbjoernl]

Blocked by: metno/aerovaldb#46