Clean up text properties in 'visual-wrap-prefix-mode'

Clean up text properties in 'visual-wrap-prefix-mode'

Before refontifying a region, remove any text properties we care about
so that we don't end up with stray properties.  Additionally, make sure
to remove all the properties when deactivating the mode.

* lisp/emacs-lisp/subr-x.el (add-remove--display-text-property): New
function, extracted from...
(add-display-text-property): ... here.
(remove-display-text-property): New function.

* lisp/visual-wrap.el (visual-wrap--remove-properties): New function...
(visual-wrap-prefix-function, visual-wrap-prefix-mode): ... call it.

* test/lisp/emacs-lisp/subr-x-tests.el
(subr-x-test-remove-display-text-property): New test.

* test/lisp/visual-wrap-tests.el
(visual-wrap-tests/wrap-prefix-stickiness, visual-wrap-tests/cleanup):
New tests.

* doc/lispref/display.texi (Display Property): Document
'remove-display-text-property'.

* etc/NEWS: Announce 'remove-display-text-property' (bug#76018).

(cherry picked from commit 90c0c9a01ed11944c5502f809817a028a1096ee6)