Test aiida pre-release v2.8.0

[agoscinski]

We need to actually not remove here but make its usage dependent on aiida-core version, since it is still needed for older versions.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.42%. Comparing base (4a4264d) to head (6bb5195).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #70      +/-   ##
==========================================
- Coverage   89.87%   89.42%   -0.46%     
==========================================
  Files          22       22              
  Lines        1324     1324              
==========================================
- Hits         1190     1184       -6     
- Misses        134      140       +6     

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