disable caching for pyaro based datasets

[jgriesfeller]

Change Summary

The subject says it all

Related issue number

fix #1532

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 78.24%. Comparing base (2c68b0f) to head (eaa4153).
Report is 8 commits behind head on main-dev.

Additional details and impacted files

@@             Coverage Diff              @@
##           main-dev    #1535      +/-   ##
============================================
+ Coverage     78.23%   78.24%   +0.01%     
============================================
  Files           145      145              
  Lines         21643    21645       +2     
============================================
+ Hits          16932    16936       +4     
+ Misses         4711     4709       -2     

Flag	Coverage Δ
unittests	78.24% <100.00%> (+0.01%)	⬆️

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