P2: Important Description
when building manual tests from dev, there's a name clash of the `assimp` target:
[cmake] CMake Error at /home/tim/build/build-qt6-dev-clang_17-Debug/qtbase/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:676 (add_executable): [cmake] add_executable cannot create target "assimp" because another target with [cmake] the same name already exists. The existing target is a custom target [cmake] created in source directory [cmake] "/home/tim/dev/qt6-dev/qtquick3d/src/plugins/assetimporters/assimp". See [cmake] documentation for policy CMP0002 for more details. [cmake] Call Stack (most recent call first): [cmake] qtbase/cmake/QtExecutableHelpers.cmake:32 (_qt_internal_create_executable) [cmake] qtbase/cmake/QtTestHelpers.cmake:518 (qt_internal_add_executable) [cmake] qtbase/cmake/QtTestHelpers.cmake:101 (qt_internal_add_test) [cmake] qt3d/tests/manual/assimp/CMakeLists.txt:10 (qt_internal_add_manual_test)