Pass environment object instead of environment.name

lib/gitlab/prometheus/queries/query_additional_metrics.rb

@@ -76,7 +76,7 @@ module Gitlab
             timeframe_start: timeframe_start,
             timeframe_end: timeframe_end,
             ci_environment_slug: environment.slug,
-            kube_namespace: environment.project.deployment_platform(environment: environment.name)&.actual_namespace || '',
+            kube_namespace: environment.project.deployment_platform(environment: environment)&.actual_namespace || '',
             environment_filter: %{container_name!="POD",environment="#{environment.slug}"}
           }
         end