tell OpenCppCoverage that we run an optimized build

should fix the crash accordign to the doc linked there
https://github.com/OpenCppCoverage/OpenCppCoverage/wiki/FAQ#your-application-has-thrown-an-unhandled-exception-code-3221225477-exception_access_violation

Signed-off-by: Matthieu Gallien <matthieu.gallien@nextcloud.com>

.github/workflows/windows-build-and-test.yml

@@ -72,7 +72,7 @@ jobs:
 
               $binFolder = "$buildFolder\bin"
 
-              & OpenCppCoverage.exe --quiet --sources ${{ github.workspace }} --modules $binFolder\*.dll* --export_type cobertura:${{ env.COBERTURA_COVERAGE_FILE }} --cover_children -- ctest --output-on-failure --timeout 300
+              & OpenCppCoverage.exe --optimized_build --quiet --sources ${{ github.workspace }} --modules $binFolder\*.dll* --export_type cobertura:${{ env.COBERTURA_COVERAGE_FILE }} --cover_children -- ctest --output-on-failure --timeout 300
           }
           
           runTestsAndCreateCoverage