sigproxy: ignore if container already removed

If the container is already removed do not log a warning as this happens
in parallel so it is possible the container was already removed. The
flake was shown in #26017.

Signed-off-by: Paul Holzinger <[email protected]>

Author: Luap99

pkg/domain/infra/abi/terminal/sigproxy_commn.go

@@ -33,7 +33,8 @@ func ProxySignals(ctr *libpod.Container) {
 			}
 
 			if err := ctr.Kill(uint(syscallSignal)); err != nil {
-				if errors.Is(err, define.ErrCtrStateInvalid) {
+				// If the container is no longer running/removed do not log it as error.
+				if errors.Is(err, define.ErrCtrStateInvalid) || errors.Is(err, define.ErrNoSuchCtr) || errors.Is(err, define.ErrCtrRemoved) {
 					logrus.Infof("Ceasing signal forwarding to container %s as it has stopped", ctr.ID())
 				} else {
 					logrus.Errorf("forwarding signal %d to container %s: %v", s, ctr.ID(), err)