Merge pull request #33528 from FRidh/imp/pythonnousersite

wrapPythonPrograms: do not propagate disabling user site-packages to child-processes

pkgs/development/interpreters/python/wrap.sh

···
                     # (see pkgs/build-support/setup-hooks/make-wrapper.sh)
                     local -a wrap_args=("$f"
                                     --prefix PATH ':' "$program_PATH"
-                                    --set PYTHONNOUSERSITE "true"
+                                    --add-flags '-s'
                                     )
 
                     # Add any additional arguments provided by makeWrapperArgs