AO3-5578 Use ActiveStorage for existing image uploads #4860

Job	Run time
rake db:otwseed	1m 40s
rspec spec/controllers	12m 30s
rspec spec/models	5m 54s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	8m 34s
cucumber features/admins	7m 57s
cucumber features/bookmarks	4m 45s
cucumber features/collections	6m 50s
cucumber features/comments_and_kudos	7m 6s
cucumber features/gift_exchanges	6m 45s
cucumber features/importing	2m 47s
cucumber features/other_a	11m 32s
cucumber features/other_b	8m 26s
cucumber features/prompt_memes_a	3m 58s
cucumber features/prompt_memes_b	3m 36s
cucumber features/prompt_memes_c	5m 5s
cucumber features/search	6m 17s
cucumber features/tag_sets	4m 25s
cucumber features/tags_and_wrangling	6m 38s
cucumber features/users	5m 16s
cucumber features/works	12m 23s
	2h 12m 24s

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