Change forms pages to use different data

- rework the list of documents on the forms pages to use the content item data in `details->attachments` to render the required content, in place of the data in `details->documents`, which is pre-rendered
- will make putting tracking onto these elements easier

app/presenters/publication_presenter.rb

@@ -10,8 +10,8 @@ def details
     content_item["details"]["body"]
   end
 
-  def documents
-    content_item["details"]["documents"].to_a.join("")
+  def documents_attachments
+    content_item["details"]["attachments"]
   end
 
   def featured_attachments

app/views/content_items/_attachments.html.erb

@@ -1,17 +1,20 @@
-<% attachments ||= [] %>
-<% attachment_details = attachments.filter_map { |id| @content_item&.attachment_details(id) } %>
+<% featured_attachments ||= [] %>
+<% attachment_details = featured_attachments.filter_map { |id| @content_item&.attachment_details(id) } %>
 <% if legacy_pre_rendered_documents.present? || attachment_details.any? %>
   <section id="<%= title.parameterize %>">
     <%= render 'govuk_publishing_components/components/heading',
         text: title,
         mobile_top_margin: true %>
 
-    <% if legacy_pre_rendered_documents.present? %>
-      <%= render 'govuk_publishing_components/components/govspeak', {
-        direction: page_text_direction,
-      } do %>
-        <% add_gem_component_stylesheet("details") if legacy_pre_rendered_documents.include? "govuk\-details" %>
-        <%= raw(legacy_pre_rendered_documents) %>
+    <% add_gem_component_stylesheet("details") %>
+    <% if attachments.present? %>
+      <% attachments.each do |details| %>
+        <div class="govuk-!-static-margin-bottom-6">
+          <%= render 'govuk_publishing_components/components/attachment', {
+            heading_level: 3,
+            attachment: details
+          } %>
+        </div>
       <% end %>
     <% else %>
       <% attachment_details.each do |details| %>

app/views/content_items/publication.html.erb

@@ -52,7 +52,8 @@
         <%= render "attachments",
           title: t("publication.documents", count: 5), # This should always be pluralised.
           legacy_pre_rendered_documents: @content_item.documents,
-          attachments: @content_item.featured_attachments
+          attachments: @content_item.documents_attachments,
+          featured_attachments: @content_item.featured_attachments
         %>
 
         <section id="details">

test/presenters/publication_presenter_test.rb

@@ -10,7 +10,7 @@ def schema_name
     assert_equal schema_item["schema_name"], presented_item.schema_name
     assert_equal schema_item["title"], presented_item.title
     assert_equal schema_item["details"]["body"], presented_item.details
-    assert_equal schema_item["details"]["documents"].join(""), presented_item.documents
+    assert_equal schema_item["details"]["documents"], presented_item.documents_attachments
   end
 
   test "#published returns a formatted date of the day the content item became public" do