feat(admin): disable publish button when there are errors

app/views/administrateurs/procedures/_unpublished_changes_sticky_header.html.haml

@@ -6,4 +6,5 @@
         = t('.intro_html').html_safe
       %span.no-wrap
         = link_to t('.see_changes'), admin_procedure_path(procedure), class: 'fr-btn fr-btn--secondary fr-mr-2w'
-        = link_to t('.publish_changes'), admin_procedure_publish_revision_path(procedure), class: 'fr-btn', method: :put, data: { disable_with: "Publication...", confirm: 'Êtes-vous sûr de vouloir publier les modifications ?' }
+        = link_to_if procedure.draft_revision.valid? && procedure.valid?(:publication), t('.publish_changes'), admin_procedure_publish_revision_path(procedure), class: 'fr-btn', method: :put, data: { disable_with: "Publication...", confirm: 'Êtes-vous sûr de vouloir publier les modifications ?' } do
+          %button.fr-btn{ disabled: "disabled" }= t('.publish_changes')

spec/system/administrateurs/types_de_champ_spec.rb

@@ -379,13 +379,16 @@
 
       within all('.type-de-champ').last do
         fill_in 'Libellé du champ', with: 'Deuxième champ'
+        select 'Choix simple', from: 'Type de champ'
+        fill_in "Options de la liste", with: "" # make tdc invalid
       end
 
       expect(page).to have_field('Libellé du champ', with: 'Premier champ')
       expect(page).to have_field('Libellé du champ', with: 'Deuxième champ')
 
       expect(page).to have_selector('.sticky-header.sticky-header-warning')
       expect(page).to have_content("Les modifications effectuées ne seront visibles qu'à la prochaine publication")
+      expect(page).to have_button('Publier les modifications', disabled: true)
 
       # Supprime dernier champ
       all('.fr-btn--tertiary-no-outline[title="Supprimer le champ"]').last.click