Merge branch '6.3' into 6.4

* 6.3:
  [DependencyInjection] Fix dumping containers with null-referenced services
  [Routing] Fix removing aliases pointing to removed route in RouteCollection::remove()
  [VarExporter] Fix lazy ghost trait when using nullsafe operator

Author: derrabus

Dumper/PhpDumper.php

@@ -258,6 +258,7 @@ public function dump(array $options = []): string|array
 <?php
 
 use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
 /*{$this->docStar}

Tests/Fixtures/php/services10_as_files.txt

@@ -13,6 +13,7 @@ return [
 namespace Container%s;
 
 use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
 /**

Tests/Fixtures/php/services9_as_files.txt

@@ -23,6 +23,7 @@ return [
 namespace Container%s;
 
 use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
 /**

Tests/Fixtures/php/services_deprecated_parameters_as_files.txt

@@ -5,6 +5,7 @@ Array
 namespace Container%s;
 
 use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
 /**

Tests/Fixtures/php/services_non_shared_lazy_as_files.txt

@@ -5,6 +5,7 @@ Array
 namespace Container%s;
 
 use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
 /**