[feat][resotocore] Implement aggregate over arrays

[aquamatthias]

Description

To-Dos

• Add test coverage for new or updated functionality
• Lint and test with tox

Code of Conduct

By submitting this pull request, I agree to follow the code of conduct.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (cf5f015) 89.80% compared to head (5cb6dda) 89.84%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1780      +/-   ##
==========================================
+ Coverage   89.80%   89.84%   +0.03%     
==========================================
  Files          91       91              
  Lines       15417    15482      +65     
==========================================
+ Hits        13846    13910      +64     
- Misses       1571     1572       +1     

Flag	Coverage Δ
resotocore	89.84% <97.36%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
resotocore/resotocore/cli/cli.py	91.83% <100.00%> (+0.06%)	⬆️
resotocore/resotocore/query/model.py	91.18% <100.00%> (+0.06%)	⬆️
resotocore/resotocore/query/query_parser.py	98.65% <100.00%> (ø)
resotocore/resotocore/db/arango_query.py	97.53% <98.36%> (+0.08%)	⬆️
resotocore/resotocore/report/inspector_service.py	91.16% <0.00%> (ø)

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