AO3-5578 Use ActiveStorage for existing image uploads #4859

Job	Run time
rake db:otwseed	1m 27s
rspec spec/controllers	13m 1s
rspec spec/models	5m 45s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	8m 15s
cucumber features/admins	6m 45s
cucumber features/bookmarks	4m 35s
cucumber features/collections	6m 19s
cucumber features/comments_and_kudos	6m 13s
cucumber features/gift_exchanges	7m 1s
cucumber features/importing	2m 41s
cucumber features/other_a	11m 49s
cucumber features/other_b	6m 37s
cucumber features/prompt_memes_a	4m 5s
cucumber features/prompt_memes_b	3m 47s
cucumber features/prompt_memes_c	5m 9s
cucumber features/search	6m 25s
cucumber features/tag_sets	3m 20s
cucumber features/tags_and_wrangling	6m 58s
cucumber features/users	5m 25s
cucumber features/works	12m 34s
	2h 8m 11s

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