CMake: Set CMP0167

[dweindl]

see https://cmake.org/cmake/help/latest/policy/CMP0167.html

Closes #2476

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.61%. Comparing base (837e70b) to head (03bcf13).
Report is 39 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2480      +/-   ##
===========================================
- Coverage    77.62%   77.61%   -0.02%     
===========================================
  Files          324      324              
  Lines        20933    20933              
  Branches      1464     1464              
===========================================
- Hits         16250    16247       -3     
- Misses        4680     4683       +3     
  Partials         3        3              

Flag	Coverage Δ
cpp	73.37% <ø> (-0.02%)	⬇️
cpp_python	34.08% <ø> (ø)
petab	36.65% <ø> (ø)
python	72.15% <ø> (-0.01%)	⬇️

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see 3 files with indirect coverage changes