Add Form::BaseBatch class for "batch form update" objects (#35458)

app/models/form/base_batch.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class Form::BaseBatch
+  include ActiveModel::Model
+  include Authorization
+  include AccountableConcern
+
+  attr_accessor :action,
+                :current_account
+
+  def save
+    raise 'Override in subclass'
+  end
+end