[php-src] Issue #15196: BackedEnum::from($value) ReflectionType is inconsistent with the actual type at runtime

Issue: https://github.com/php/php-src/issues/15196 Author: vudaltsov ### Description The following code: ```php <?php declare(strict_types=1); enum MyBackedEnum: int { case One = 1; } try { MyBackedEnum::from('1'); } catch (Throwable $exception) { echo $exception->getMessage(), PHP_EOL; } echo (new ReflectionProperty(MyBackedEnum::class, 'value'))->getType(), PHP_EOL; echo (new ReflectionParameter([MyBackedEnum::class, 'from'], 'value'))->getType(), PHP_EOL; echo (new ReflectionParameter([MyBackedEnum::class, 'tryFrom'], 'value'))->getType(), PHP_EOL; ``` Resulted in this output: ``` MyBackedEnum::from(): Argument #1 ($value) must be of type int, string given int string|int string|int ``` But I expected this output instead: ``` MyBackedEnum::from(): Argument #1 ($value) must be of type int, string given int int int ``` https://3v4l.org/WkLXe ### PHP Version PHP 8.2 ### Operating System _No response_