tootctl accounts [add|del|cull] (#8642)

* CLI interface for creating/deleting local users

- tootctl accounts add USERNAME
- tootctl accounts del USERNAME

* Add CLI interface for culling remote users that no longer exist

- tootctl accounts cull

lib/mastodon/cli_helper.rb

@@ -4,5 +4,6 @@ dev_null = Logger.new('/dev/null')
 
 Rails.logger                 = dev_null
 ActiveRecord::Base.logger    = dev_null
+ActiveJob::Base.logger       = dev_null
 HttpLog.configuration.logger = dev_null
 Paperclip.options[:log]      = false