[Dotenv] Add Dotenv::bootEnv() to check for .env.local.php before calling Dotenv::loadEnv()

Author: nicolas-grekas

composer.json

@@ -41,6 +41,7 @@
     },
     "conflict": {
         "symfony/dependency-injection": "<4.4",
+        "symfony/dotenv": "<5.1",
         "symfony/event-dispatcher": "<4.4",
         "symfony/lock": "<4.4",
         "symfony/process": "<4.4"