Move revert-buffer-restore-functions use from buff-menu.el to outline.el

Move revert-buffer-restore-functions use from buff-menu.el to outline.el

* lisp/buff-menu.el (Buffer-menu-mode): Remove
revert-buffer-restore-functions with handling of
outline-minor-mode and move it to outline-minor-mode.

* lisp/outline.el (outline-minor-mode):
Add revert-buffer-restore-functions to call
outline-minor-mode-highlight-buffer after reverting the buffer
with outline-minor-mode and outline-minor-mode-highlight
where font-lock can't be used to update highlighting.

(cherry picked from commit fe79a6ff507670a2ab79fca060c2727fcd0a4dae)