AO3-6634 Add board_assistants_team admin role #3904

Job	Run time
rake db:otwseed	1m 10s
rspec spec/controllers	11m 14s
rspec spec/models	5m 36s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	5m 23s
cucumber features/admins	4m 55s
cucumber features/bookmarks	4m 58s
cucumber features/collections	6m 10s
cucumber features/comments_and_kudos	5m 51s
cucumber features/gift_exchanges	6m 11s
cucumber features/importing	2m 48s
cucumber features/other_a	10m 28s
cucumber features/other_b	6m 21s
cucumber features/prompt_memes_a	4m 6s
cucumber features/prompt_memes_b	3m 34s
cucumber features/prompt_memes_c	5m 16s
cucumber features/search	6m 36s
cucumber features/tag_sets	3m 34s
cucumber features/tags_and_wrangling	5m 58s
cucumber features/users	4m 41s
cucumber features/works	12m 9s
	1h 56m 59s

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