use FTL for loading named teams in team git listing (#14317)
use FTL for loading named teams in team git listing (#14317)

- it should be OK to use the slow loader for implicit teams, since there is basically only one to list
keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client