[#1388] ir: Annotate cmode as nolint

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/innerring/innerring.go

@@ -103,6 +103,8 @@ type (
 		// to the application.
 		runners []func(chan<- error) error
 
+		// cmode used for upgrade scenario.
+		// nolint:unused
 		cmode *atomic.Bool
 	}