chore(a11y): mutualise la gestion des <button> qui font des action POST/DESTROY dans un composant unique

app/views/shared/dossiers/_edit.html.haml

@@ -9,9 +9,7 @@
     - form_options = { url: brouillon_dossier_url(dossier), method: :patch }
   - else
     - form_options = { url: modifier_dossier_url(dossier), method: :patch }
-  = render EditableChamp::DeleteFormRepetitionRowComponent.new
-  = render EditableChamp::AddFormRepetitionRowComponent.new
-  = render Attachment::DeleteFormComponent.new
+  = render NestedForms::FormOwnerComponent.new
   = form_for dossier, form_options.merge({ html: { id: 'dossier-edit-form', class: 'form', multipart: true, novalidate: 'novalidate' } }) do |f|
 
     %header.mb-6

app/views/shared/dossiers/_edit_annotations.html.haml

@@ -1,9 +1,7 @@
 .container.dossier-edit
   - if dossier.champs_private.present?
     %section.counter-start-header-section
-      = render EditableChamp::AddFormRepetitionRowComponent.new
-      = render EditableChamp::DeleteFormRepetitionRowComponent.new
-      = render Attachment::DeleteFormComponent.new
+      = render NestedForms::FormOwnerComponent.new
       = form_for dossier, url: annotations_instructeur_dossier_path(dossier.procedure, dossier), html: { class: 'form', multipart: true } do |f|
         - dossier.champs_private.each do |champ|
           = fields_for champ.input_name, champ do |form|

app/views/shared/dossiers/messages/_form.html.haml

@@ -1,4 +1,4 @@
-= render Attachment::DeleteFormComponent.new
+= render NestedForms::FormOwnerComponent.new
 = form_for(commentaire, url: form_url, html: { class: 'form', multipart: true, data: { controller: 'persisted-form', persisted_form_key_value: @dossier.present? ? dom_id(@dossier) : dom_id(@procedure, :bulk_message) } }) do |f|
   - dossier = commentaire.dossier
   - placeholder = t('views.shared.dossiers.messages.form.write_message_to_administration_placeholder')