[3.13] gh-120873: Add test for "state" option in ttk.Scale (GH-120874) (GH-120875)

Also refactor the "state" option tests for other ttk widgets.
(cherry picked from commit 974a978631bfbfa6f617e927d5eaa82b06694ae5)

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