[php-src] Issue #12480: Cannot use PDO with readonly and constructor property promotion

Issue: https://github.com/php/php-src/issues/12480 Author: GregoireHebert ### Description The following code: ```php <?php class Foo { public function __construct(public readonly int $prop){} } $pdo = new \PDO('sqlite:'.__DIR__.'/db'); $pdo->exec('CREATE TABLE IF NOT EXISTS Foo (prop integer not null primary key)'); $pdo->exec('REPLACE INTO Foo values (1)'); $preparation = $pdo->prepare( 'SELECT * FROM Foo WHERE prop = 1' ); $preparation->setFetchMode(\PDO::FETCH_CLASS, Foo::class); $preparation->execute(); $result = $preparation->fetch(); var_dump($result); ``` Resulted in this output: ``` PHP Fatal error: Uncaught ArgumentCountError: Too few arguments to function Foo::__construct(), 0 passed and exactly 1 expected in /Users/gheb/test.php:5 Stack trace: #0 [internal function]: Foo->__construct() #1 /Users/gheb//test.php(18): PDOStatement->fetch() #2 {main} thrown in /Users/gheb//test.php on line 5 ``` But I expected this output instead: ``` object(Foo)#1 (1) { ["prop"]=> int(1) } ``` Note that if default values were set, you would get (as expected): ``` Fatal error: Uncaught Error: Cannot modify readonly property Foo::$prop ``` ### PHP Version php >=8.1 ### Operating System _No response_