Merge branch 'cmake_fix' into 'master'

Minor fix in extern/CMakeLists.txt: there is no variable BUILD_UNITTESTS anymore

See merge request OpenMW/openmw!4270

extern/CMakeLists.txt

@@ -294,7 +294,7 @@ if (NOT OPENMW_USE_SYSTEM_ICU)
     set(ICU_LIBRARIES ICU::i18n ICU::uc ICU::data PARENT_SCOPE)
 endif()
 
-if ((BUILD_UNITTESTS OR BUILD_OPENCS_TESTS) AND NOT OPENMW_USE_SYSTEM_GOOGLETEST)
+if ((BUILD_COMPONENTS_TESTS OR BUILD_OPENCS_TESTS OR BUILD_OPENMW_TESTS) AND NOT OPENMW_USE_SYSTEM_GOOGLETEST)
 
     include(FetchContent)
     FetchContent_Declare(googletest