[12.x] Fix WithCachedConfig to work with parallel test runs (laravel#57785)

* Update TestCase.php

* test

* Update TestCase.php

Author: cosmastech

src/Illuminate/Testing/Concerns/TestDatabases.php

@@ -19,6 +19,13 @@ trait TestDatabases
      */
     protected static $schemaIsUpToDate = false;
 
+    /**
+     * The root database name prior to concatenating the token.
+     *
+     * @var null|string
+     */
+    protected static $originalDatabaseName = null;
+
     /**
      * Boot a test database.
      *
@@ -186,6 +193,12 @@ protected function switchToDatabase($database)
      */
     protected function testDatabase($database)
     {
+        if (! isset(self::$originalDatabaseName)) {
+            self::$originalDatabaseName = $database;
+        } else {
+            $database = self::$originalDatabaseName;
+        }
+
         $token = ParallelTesting::token();
 
         return "{$database}_test_{$token}";