docker auth: only log and don't fail if some auth creds were not able…

… to be obtained

container-engine-lib/lib/backend_impls/docker/docker_kurtosis_backend/engine_functions/docker_config_storage_creator/docker_config_storage_creator.go

@@ -114,10 +114,10 @@ func storeConfigInVolume(
 	for _, registry := range registries {
 		creds, err := docker_manager.GetAuthFromDockerConfig(registry)
 		if err != nil {
-			return stacktrace.NewError("An error occurred getting auth for registry '%v' from Docker config: %v", registry, err)
+			logrus.Warnf("An error occurred getting auth for registry '%v' from Docker config: %v", registry, err)
 		}
 		// creds can be nil if the registry doesn't have auth
-		if creds != nil {
+		if err != nil && creds != nil {
 			cfg.Auths[registry] = *creds
 		}
 	}