Set CMake3.30 policies

[dweindl]

Prevent cmake warnings.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.67%. Comparing base (bea2dfe) to head (a614b75).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2492      +/-   ##
===========================================
- Coverage    77.68%   77.67%   -0.01%     
===========================================
  Files          324      324              
  Lines        20941    20941              
  Branches      1456     1456              
===========================================
- Hits         16267    16266       -1     
- Misses        4671     4672       +1     
  Partials         3        3              

Flag	Coverage Δ
cpp	73.44% <ø> (ø)
cpp_python	34.07% <ø> (-0.01%)	⬇️
petab	36.63% <ø> (ø)
python	72.22% <ø> (-0.01%)	⬇️

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see 1 file with indirect coverage changes