[3.14] gh-132813: Improve error messages for incorrect types and values of csv.Dialog attributes (GH-133241) (GH-135050)

Make them similar to PyArg_Parse error messages, mention None as
a possible value, show a wrong type and the string length.
(cherry picked from commit df98a47a61a274eb7427c6201ddabec9ffd30b0a)

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