[HttpKernel] allow using public aliases to reference controllers

Author: nicolas-grekas

Kernel/MicroKernelTrait.php

@@ -141,7 +141,7 @@ public function registerContainerConfiguration(LoaderInterface $loader)
                 AbstractConfigurator::$valuePreProcessor = $valuePreProcessor;
             }
 
-            $container->setAlias(static::class, 'kernel');
+            $container->setAlias(static::class, 'kernel')->setPublic(true);
         });
     }