Set environment for SBV internally automatically to internal

Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-committed-by: Gode, Sebastian <sebastian.gode@t-systems.com>

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