Remove redundant feedback component in Orders & Products tables

Eliminated an unnecessary double rendering of the feedback component in both
the Orders and Products tables.
This change leverages the `page_header_actions` helper, aligning with the
updates in #5445.

admin/app/components/solidus_admin/orders/index/component.html.erb

@@ -5,7 +5,6 @@
     </h1>
 
     <div class="ml-auto flex gap-2 items-center">
-      <%= render component("feedback").new %>
       <%= render component("ui/button").new(
         tag: :a,
         text: t('.create_order'),

admin/app/components/solidus_admin/orders/new/component.html.erb

@@ -5,7 +5,6 @@
     <%= page_header_title t(".create_order") %>
 
     <%= page_header_actions do %>
-      <%= render component("feedback").new %>
       <%= render component("ui/button").new(tag: :button, scheme: :secondary, text: t(".discard"), form: form_id) %>
       <%= render component("ui/button").new(tag: :button, text: t(".save"), form: form_id) %>
     <% end %>

admin/app/components/solidus_admin/products/index/component.html.erb

@@ -2,7 +2,6 @@
   <%= page_header do %>
     <%= page_header_title title %>
     <%= page_header_actions do %>
-      <%= render component("feedback").new %>
       <%= render component("ui/button").new(
         tag: :a,
         text: t('.add_product'),