[3.14] gh-53189: Document peculiarities of InteractiveConsole in relation to pickle (GH-123069) (GH-134328)

gh-53189: Document peculiarities of InteractiveConsole in relation to pickle (GH-123069)

(cherry picked from commit a31bbc951a9d74cd7b9092555c101e51a2b9482b)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>