Abstract dismissable banner to new table

Problem

We currently have 548 columns in application_settings and we store a lot of data which does not belong there.

As suggested in !172151 (comment 2215440641) we should create a new abstraction for this.

Solution

Let's create a new table to persist dismissable banner at the instance level.

class ApplicationSettings
  has_many :dissmissable_banners
end

module AppConfig
  class DissmissableBanner
    belongs_to :application_settings
  end
end

cc @jivanvl