fixup! Fix cpp-linter tests to avoid .git dependency

[tautschnig]

Extend the fix from #7799 to CMake configurations.

Fixes: #7881

• Each commit message has a non-empty body, explaining why the change was made.
• n/a Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• n/a The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• n/a My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• n/a White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.65% 🎉

Comparison is base (92581d1) 78.27% compared to head (a4bb92e) 78.92%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #7882      +/-   ##
===========================================
+ Coverage    78.27%   78.92%   +0.65%     
===========================================
  Files         1699     1699              
  Lines       195410   195410              
===========================================
+ Hits        152953   154228    +1275     
+ Misses       42457    41182    -1275     

see 57 files with indirect coverage changes

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