AO3-5860 Prevent leaving comments or kudos when logged in as admin #3963

Job	Run time
rake db:otwseed	1m 59s
rspec spec/controllers	10m 35s
rspec spec/models	5m 27s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	7m 59s
cucumber features/admins	4m 59s
cucumber features/bookmarks	4m 42s
cucumber features/collections	6m 46s
cucumber features/comments_and_kudos	6m 20s
cucumber features/gift_exchanges	6m 17s
cucumber features/importing	2m 35s
cucumber features/other_a	10m 8s
cucumber features/other_b	6m 47s
cucumber features/prompt_memes_a	4m 6s
cucumber features/prompt_memes_b	3m 46s
cucumber features/prompt_memes_c	5m 3s
cucumber features/search	6m 27s
cucumber features/tag_sets	3m 18s
cucumber features/tags_and_wrangling	6m 33s
cucumber features/users	5m 15s
cucumber features/works	13m 27s
	2h 2m 29s

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