Add bundled version of googletest for Arccore

[grospelliergilles]

This will help to make sure googletest use the same compilation options than Arccore.

[codecov]

Codecov Report

❌ Patch coverage is 15.69507% with 188 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.38%. Comparing base (abc6f3c) to head (cc67d33).
⚠️ Report is 2812 commits behind head on main.

Files with missing lines	Patch %	Lines
...ogletest/googletest/include/gtest/gtest-printers.h	0.00%	97 Missing ⚠️
...ogletest/include/gtest/internal/gtest-param-util.h	0.00%	29 Missing ⚠️
...extras/googletest/googletest/include/gtest/gtest.h	34.37%	19 Missing and 2 partials ⚠️
...oogletest/include/gtest/internal/gtest-type-util.h	0.00%	17 Missing ⚠️
.../googletest/include/gtest/gtest-assertion-result.h	18.18%	9 Missing ⚠️
...oogletest/googletest/include/gtest/gtest-message.h	0.00%	6 Missing ⚠️
...googletest/include/gtest/internal/gtest-internal.h	81.48%	4 Missing and 1 partial ⚠️
...est/googletest/include/gtest/internal/gtest-port.h	0.00%	4 Missing ⚠️

❌ Your patch check has failed because the patch coverage (15.69%) is below the target coverage (50.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1202      +/-   ##
==========================================
- Coverage   68.46%   68.38%   -0.08%     
==========================================
  Files        2050     2058       +8     
  Lines      149478   149701     +223     
  Branches    17243    17274      +31     
==========================================
+ Hits       102345   102379      +34     
- Misses      41005    41190     +185     
- Partials     6128     6132       +4     

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