Check embedded_terraform role in Button disabled?

Prevent the user from adding credentials/repositories if the
embedded_terraform role is disabled.

Author: agrare

app/helpers/application_helper/button/embedded_terraform.rb

@@ -1,6 +1,8 @@
 class ApplicationHelper::Button::EmbeddedTerraform < ApplicationHelper::Button::Basic
   def disabled?
-    if Rbac.filtered(ManageIQ::Providers::EmbeddedTerraform::AutomationManager.all).empty?
+    if !MiqRegion.my_region.role_active?('embedded_terraform')
+      @error_message = _("Embedded Terraform Role is not enabled.")
+    elsif Rbac.filtered(ManageIQ::Providers::EmbeddedTerraform::AutomationManager.all).empty?
       @error_message = _("User isn't allowed to use the Embedded Terraform provider.")
     end
   end