Print warning instead of error in case of unstable cluster

- Since the code doesn't exit, the error messaging might be confusing to users

pkg/crc/machine/start.go

@@ -602,7 +602,7 @@ func (client *client) Start(ctx context.Context, startConfig types.StartConfig)
 
 	logging.Infof("Starting %s instance... [waiting for the cluster to stabilize]", startConfig.Preset)
 	if err := cluster.WaitForClusterStable(ctx, instanceIP, constants.KubeconfigFilePath, proxyConfig); err != nil {
-		logging.Errorf("Cluster is not ready: %v", err)
+		logging.Warnf("Cluster is not ready: %v", err)
 	}
 
 	waitForProxyPropagation(ctx, ocConfig, proxyConfig)