fix is_new issue with enrollment fixes

tests/_support/bootstrap.php

@@ -7,6 +7,26 @@ if (! getenv('CI_ENVIRONMENT')) {
     $_SERVER['CI_ENVIRONMENT'] = 'testing';
 }
 
+// Minimal Locale polyfill when the intl extension is unavailable in the test PHP build.
+if (! class_exists(\Locale::class, false)) {
+    class Locale
+    {
+        private static string $default = 'en';
+
+        public static function setDefault(string $locale): bool
+        {
+            self::$default = $locale;
+
+            return true;
+        }
+
+        public static function getDefault(): string
+        {
+            return self::$default;
+        }
+    }
+}
+
 $writablePath = realpath(__DIR__ . '/../..') . DIRECTORY_SEPARATOR . 'writable';
 $runtimeDirectories = [
     $writablePath . DIRECTORY_SEPARATOR . 'cache',