[cmake] use new dune-pybindx way of installing python package as editable

CMakeLists.txt

@@ -61,10 +61,10 @@ add_subdirectory(dune)
 add_subdirectory(cmake/modules)
 add_subdirectory(examples EXCLUDE_FROM_ALL)
 
-include(DuneXTInstallPythonPackage)
+include(DunePybindxiInstallPythonPackage)
 # this symlinks all files in python/ to the binary dir and install into the virtualenv from there thereby making the
 # compiled extensions directly usable from the venv
-dune_python_install_package(PATH python)
+dune_pybindxi_install_python_package(PATH python)
 include_dependent_binary_python_dirs()
 # do not change order here
 if(dune-pybindxi_FOUND)