[3.13] gh-118760: Fix errors in calling Tkinter bindings on Windows (GH-118782) (GH-119072)

For unknown reasons some arguments for Tkinter binding can be created
as a 1-tuple containing a Tcl_Obj when wantobjects is 2.
(cherry picked from commit 5b88d95cc542cf02303c6fe0e8719a93544decdb)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>