[php-src] Issue #20673: 8.5 and memcached

Issue: https://github.com/php/php-src/issues/20673
Author: VARGA-Peter

### Description

When I try to compile the php memcached master source code for 8.5 using phpize I receive this

```
/builds/php-memcached-master/php_memcached.c:3790:16: warning: returning ‘int’ from a function with return type ‘zend_class_entry *’ {aka ‘struct _zend_class_entry *’} makes pointer from integer without a cast [-Wint-conversion]
 3790 |         return zend_exception_get_default();
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

```

But then apache fails to load because it complains that `zend_exception_get_default` can't be found.

I am not quite sure if I do everything correctly. Anyway, what is the best library to use memcached with 8.5?

### PHP Version

```plain
PHP 8.5.0
```

### Operating System

SLES 15 SP7