Manage observability at entrypoint and router level

Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>

pkg/redactor/redactor_config_test.go

@@ -57,6 +57,11 @@ func init() {
 						},
 					},
 				},
+				Observability: &dynamic.RouterObservabilityConfig{
+					AccessLogs: pointer(true),
+					Tracing:    pointer(true),
+					Metrics:    pointer(true),
+				},
 			},
 		},
 		Services: map[string]*dynamic.Service{