[3.12] GH-121970: Extract ``changes`` into a new extension (GH-129105) (#129110)

GH-121970: Extract ``changes`` into a new extension (GH-129105)
(cherry picked from commit e54ac3b69edacf4149988150591226df1397d127)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>