Use resourceful routes

https://github.com/rails/rails/pull/23980

config/locales/registrant/domains.en.yml

@@ -4,6 +4,8 @@ en:
       index:
         header: Domains
         registrant: Registrant
+        download_pdf_btn: Download PDF
+        download_csv_btn: Download CSV
         reset_btn: Reset
 
       download_list:

config/locales/registrar/contacts.en.yml

@@ -2,6 +2,8 @@ en:
   registrar:
     contacts:
       search_form:
+        download_pdf_btn: Download PDF
+        download_csv_btn: Download CSV
         reset_btn: Reset
 
       partials:

config/locales/registrar/domains.en.yml

@@ -17,7 +17,7 @@ en:
         transfer_btn: Transfer
 
       search_form:
-        download_btn: Download as CSV
+        download_btn: Download CSV
         reset_btn: Reset
 
       domain:

config/routes.rb

@@ -87,7 +87,6 @@ Rails.application.routes.draw do
 
       collection do
         get 'check'
-        get 'download_list'
       end
     end
 
@@ -151,11 +150,6 @@ Rails.application.routes.draw do
     resources :registrars, only: :show
     resources :domains, only: %i[index show] do
       resources :contacts, only: %i[show edit update]
-
-      collection do
-        get :download_list
-      end
-
       member do
         get 'confirmation'
       end