cmake: rework add_python_test()

* Add FILE_NAME option
* add optional COMPONENT_NAME option
  note: needed if test.py is not in a ortools/<component>/python/ dir

ortools/util/python/CMakeLists.txt

@@ -36,6 +36,6 @@ add_library(${PROJECT_NAMESPACE}::sorted_interval_list_pybind11 ALIAS sorted_int
 if(BUILD_TESTING)
   file(GLOB PYTHON_SRCS "*_test.py")
   foreach(FILE_NAME IN LISTS PYTHON_SRCS)
-    add_python_test(${FILE_NAME})
+    add_python_test(FILE_NAME ${FILE_NAME})
   endforeach()
 endif()