Add translation for product cloned message

A validation error shouldn't happen. If it does, it's an exception, not an error.

app/controllers/spree/admin/products_controller.rb

@@ -82,13 +82,9 @@ module Spree
 
       def clone
         @new = @product.duplicate
+        raise "Clone failed" unless @new.save
 
-        flash[:success] = if @new.save
-                            Spree.t('notice_messages.product_cloned')
-                          else
-                            Spree.t('notice_messages.product_not_cloned')
-                          end
-
+        flash[:success] = t('.success')
         redirect_to spree.admin_products_url
       end
 

config/locales/en.yml

@@ -4348,6 +4348,8 @@ See the %{link} to find out more about %{sitename}'s features and to start using
           bulk_unit_size: Bulk unit size
         display_as:
           display_as: Display As
+        clone:
+          success: Product cloned
       reports:
         table:
           select_and_search: "Select filters and click on %{option} to access your data."

spec/system/admin/products_v3/products_spec.rb

@@ -237,7 +237,6 @@ describe 'As an admin, I can see the new product page', feature: :admin_style_v3
         expect(page).to have_css "button[aria-label='On Hand']", text: "6"
       end
 
-      pending
       expect(page).to have_content "Changes saved"
     end
 
@@ -398,6 +397,8 @@ describe 'As an admin, I can see the new product page', feature: :admin_style_v3
           click_link('Clone')
         end
 
+        expect(page).to have_content "Product cloned"
+
         within "table.products" do
           # Gather input values, because page.content doesn't include them.
           input_content = page.find_all('input[type=text]').map(&:value).join