route: allow standard path helper to work

for example `form_with model: [:instructeur, procedure, export_template]`

app/components/dossiers/export_dropdown_component/export_dropdown_component.html.haml

@@ -22,5 +22,5 @@
           = link_to download_export_path(export_template_id: export_template.id), role: 'menuitem', data: { turbo_method: :post, turbo: true } do
             = "Exporter à partir du modèle #{export_template.name}"
       - menu.with_item do
-        = link_to new_instructeur_export_template_path(procedure_id: params[:procedure_id]), role: 'menuitem' do
+        = link_to [:new, :instructeur, @procedure, :export_template], role: 'menuitem' do
           Ajouter un modèle d'export

config/routes.rb

@@ -443,14 +443,17 @@ Rails.application.routes.draw do
   #
 
   scope module: 'instructeurs', as: 'instructeur' do
-    resources :procedures, only: [:index, :show], param: :procedure_id do
-      member do
-        resources :archives, only: [:index, :create]
+    resources :procedures, only: [] do
       resources :export_templates, only: [:new, :create, :edit, :update, :destroy] do
         collection do
           get 'preview'
         end
       end
+    end
+
+    resources :procedures, only: [:index, :show], param: :procedure_id do
+      member do
+        resources :archives, only: [:index, :create]
 
         resources :groupes, only: [:index, :show], controller: 'groupe_instructeurs' do
           resource :contact_information