[php-src] Issue #22859: Can't build mod-zip bundled in php 8.6.0alpha2

Issue: https://github.com/php/php-src/issues/22859
Author: sergey-dryabzhinsky

### Description

Trying to build with `--with-zip=shared` with external libzip v1.1.2 by gcc-16.
Got this error:
```
 error: implicit declaration of function 'zip_file_set_encryption';
```
Php 8.5.8 or 8.4.23 builds fine

### PHP Version

```plain
PHP 8.6.0-Rusoft/Rev14.4 GCC:16.1.0 LD:2.35.2-gold CURL:7.88.1 libGD2:2.3.3 ICU:78.3 PCRE2:10.47 SSL:1.1.1w Sqlite3:3.22.0 PgSQL:12.22 ZLIB:1.3.2 (cli) (built: Jul 14 2026 13:04:34) (NTS)
Copyright  The PHP Group and Contributors
Zend Engine v4.6.0-dev, Copyright  Zend by Perforce
    with Zend OPcache v8.6.0-Rusoft/Rev14.4 GCC:16.1.0 LD:2.35.2-gold CURL:7.88.1 libGD2:2.3.3 ICU:78.3 PCRE2:10.47 SSL:1.1.1w Sqlite3:3.22.0 PgSQL:12.22 ZLIB:1.3.2, Copyright , by Zend by Perforce
```

### Operating System

Ubuntu 16.04