AO3-5578 Use rails_blob_url to allow ActiveStorage caching (#5009) #4867

Job	Run time
rake db:otwseed	1m 6s
rspec spec/controllers	12m 51s
rspec spec/models	5m 14s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	7m 59s
cucumber features/admins	7m 8s
cucumber features/bookmarks	4m 35s
cucumber features/collections	6m 19s
cucumber features/comments_and_kudos	6m 33s
cucumber features/gift_exchanges	7m 1s
cucumber features/importing	2m 46s
cucumber features/other_a	11m 44s
cucumber features/other_b	6m 33s
cucumber features/prompt_memes_a	4m 5s
cucumber features/prompt_memes_b	3m 44s
cucumber features/prompt_memes_c	4m 56s
cucumber features/search	6m 58s
cucumber features/tag_sets	3m 7s
cucumber features/tags_and_wrangling	7m 21s
cucumber features/users	4m 44s
cucumber features/works	11m 57s
	2h 6m 41s

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