Set environment for SBV internally automatically to internal

otc_metadata/templates/index_sbv.rst.j2

@@ -5,3 +5,4 @@
 
    .. service_card::
       :service_type: {{ service_type }}
+      :environment: {{ environment }}

tools/generate_doc_confpy.py

@@ -201,6 +201,7 @@ def process_repositories(args, service):
                 site_name="Internal Documentation Portal",
                 logo_url="https://docs-int.otc-service.com",
             )
+        context["environment"] = args.target_environment
         sbv_title = (service["service_title"] + "\n"
                      + ('=' * len(service["service_title"])))
         context["sbv_title"] = sbv_title