[php-src] Issue #20714: Regression: Uncatchable exception

Issue: https://github.com/php/php-src/issues/20714
Author: greg0ire

### Description

The following code:

```php
<?php
function gen(): Generator
{
    try {
        yield 1;
    } finally {
    }
}

function process(): void
{
    $g = gen();
    foreach ($g as $_) {
        throw new Exception('ERROR');
    }
}

try {
    process();
} catch (Exception $e) {
    echo "Caught\n";
}
```

Resulted in this output:
```
Fatal error: Uncaught Exception: ERROR in /in/a8M88:15
Stack trace:
#0 /in/a8M88(20): process()
#1 {main}
  thrown in /in/a8M88 on line 15

Process exited with code 255.
```

But I expected this output instead:
```
Caught
```


This works with PHP 8.4.14, and it does not work with PHP 8.4.15

### PHP Version

```plain
PHP 8.4.15 (cli) (built: Nov 18 2025 17:26:05) (NTS gcc x86_64)
Copyright (c) The PHP Group
Built by Fedora Project
Zend Engine v4.4.15, Copyright (c) Zend Technologies
```

### Operating System

_No response_