N°9319 increase php min. version to 8.2 (#887)

* Update minimum PHP version to 8.2
* Fix previous wrong resolution of merge conflict

lib/symfony/runtime/Internal/MissingDotenv.php

@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Runtime\Internal;
+
+/**
+ * @internal class that should be loaded only when symfony/dotenv is not installed
+ */
+class MissingDotenv
+{
+}