Fixed build failure on SQL Server (pdo_sqlsrv)

Use a wrapped PDO Statement instead of a custom class for `pdo_sqlsrv` since `PDOSqlsrv\Statement` doesn't extend `PDOStatement` anymore.

lib/Doctrine/DBAL/Driver/PDOConnection.php

@@ -107,7 +107,7 @@ class PDOConnection extends PDO implements Connection, ServerInfoAwareConnection
     /**
      * Creates a wrapped statement
      */
-    private function createStatement(\PDOStatement $stmt) : PDOStatement
+    protected function createStatement(\PDOStatement $stmt) : PDOStatement
     {
         return new PDOStatement($stmt);
     }

lib/Doctrine/DBAL/Driver/PDOSqlsrv/Connection.php

@@ -3,8 +3,8 @@
 namespace Doctrine\DBAL\Driver\PDOSqlsrv;
 
 use Doctrine\DBAL\Driver\PDOConnection;
+use Doctrine\DBAL\Driver\PDOStatement;
 use Doctrine\DBAL\ParameterType;
-use PDO;
 use function strpos;
 use function substr;
 
@@ -13,15 +13,6 @@ use function substr;
  */
 class Connection extends PDOConnection implements \Doctrine\DBAL\Driver\Connection
 {
-    /**
-     * {@inheritdoc}
-     */
-    public function __construct($dsn, $user = null, $password = null, ?array $options = null)
-    {
-        parent::__construct($dsn, $user, $password, $options);
-        $this->setAttribute(PDO::ATTR_STATEMENT_CLASS, [Statement::class, []]);
-    }
-
     /**
      * {@inheritDoc}
      */
@@ -51,4 +42,12 @@ class Connection extends PDOConnection implements \Doctrine\DBAL\Driver\Connecti
 
         return $val;
     }
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function createStatement(\PDOStatement $stmt) : PDOStatement
+    {
+        return new Statement($stmt);
+    }
 }