[php-src] Issue #12532: PharData created from zip has incorrect timestamp

Issue: https://github.com/php/php-src/issues/12532 Author: danepowell ### Description The following code (see attached zip): [test.zip](https://github.com/php/php-src/files/13184920/test.zip) ```php <?php $phar = new PharData('test.zip'); print($phar->getMTime()); ``` Resulted in this output: ``` 1680317060 ``` But I expected this output instead: ``` 1680284661 ``` Actually, I would perhaps expect the mtime to be that of the zipfile itself, not of its contents. I don't think the behavior of setting the mtime based on contents is documented anywhere. Regardless, the mtime should have _some_ correlation to a real value 😄 It looks like this was last touched in https://github.com/php/php-src/issues/10766 (https://github.com/php/php-src/commit/e633be3e87c59aa20c1a7edce2c259b48e2833f7) and this introduced the bug. ### PHP Version 8.2.11 ### Operating System macOS