[FTBFS] qtcoap and qtdeclarative have a conflicting target name

CMake Error at /home/tjmaciei/obj/qt/qt6-release/qtbase/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:523 (add_executable):
  add_executable cannot create target "testapp" because another target with
  the same name already exists.  The existing target is an executable created
  in source directory
  "/home/tjmaciei/src/qt/qt6-release/qtdeclarative/tests/auto/qml/qqmlapplicationengine/testapp".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  /home/tjmaciei/obj/qt/qt6-release/qtbase/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:488 (_qt_internal_create_executable)
  /home/tjmaciei/obj/qt/qt6-release/qtbase/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:754 (qt6_add_executable)
  qtcoap/examples/coap/consolecoapclient/CMakeLists.txt:22 (qt_add_executable)