Add data migration to move Natural England content to the RPA
user
```ruby
natural_england = Organisation.find_by!(slug: 'natural-england')
rpa = Organisation.find_by!(slug: 'rural-payments-agency')

docs_with_lead = EditionOrganisation.where(organisation: natural_england, lead: true).map(&:edition).compact.map(&:document).uniq
docs_with_support = EditionOrganisation.where(organisation: natural_england, lead: false).map(&:edition).compact.map(&:document).uniq

docs_with_lead.each do |document|
  begin
    next if document.document_type == 'CorporateInformationPage'
    edition = document.latest_edition
    orgs = edition.lead_organisations.to_a

    orgs << rpa unless orgs.include? rpa
    orgs.delete natural_england

    edition.lead_organisations = orgs
    edition.save!

    PublishingApiDocumentRepublishingWorker.perform_in(
      2.seconds,
      document.id,
    )
  rescue StandardError => ex
    puts "#{document.slug}: #{ex.class}, #{ex.message}"
  end
end

docs_with_support.each do |document|
  begin
    next if document.document_type == 'CorporateInformationPage'
    edition = document.latest_edition
    orgs = edition.supporting_organisations.to_a

    # handle the case where NE is the lead and RPA the support (or vice versa)
    orgs << rpa unless orgs.include?(rpa) || edition.lead_organisations.include?(rpa)
    orgs.delete natural_england

    edition.supporting_organisations = orgs
    edition.save!

    PublishingApiDocumentRepublishingWorker.perform_in(
      2.seconds,
      document.id,
    )
  rescue StandardError => ex
    puts "#{document.slug}: #{ex.class}, #{ex.message}"
  end
end
```
assistant