chore: ignore deprecations from Symfony

Symfony 7.3 is not available to all of our users, so we cannot switch to
native lazy objects, which require a PHP version higher than the lowest
PHP version we support.

Author: greg0ire

src/Configuration.php

@@ -1109,6 +1109,7 @@ public function isLazyGhostObjectEnabled(): bool
 
     public function setLazyGhostObjectEnabled(bool $flag): void
     {
+        // @phpstan-ignore classConstant.deprecatedTrait (Because we support Symfony < 7.3)
         if ($flag && ! trait_exists(LazyGhostTrait::class)) {
             throw new LogicException(
                 'Lazy ghost objects cannot be enabled because the "symfony/var-exporter" library'

src/Proxy/ProxyFactory.php

@@ -568,6 +568,7 @@ private function generateProxyClass(ClassMetadata $class, ?string $fileName, str
 
     private function generateUseLazyGhostTrait(ClassMetadata $class): string
     {
+        // @phpstan-ignore staticMethod.deprecated (Because we support Symfony < 7.3)
         $code = ProxyHelper::generateLazyGhost($class->getReflectionClass());
         $code = substr($code, 7 + (int) strpos($code, "\n{"));
         $code = substr($code, 0, (int) strpos($code, "\n}"));