[php-src] Issue #20868: SWC files don't work when zlib extension is built as shared

Issue: https://github.com/php/php-src/issues/20868
Author: petk

### Description

The following code:

```
./buildconf
./configure --with-zlib=shared
make
./sapi/cli/php -d extension_dir=modules run-tests.php ext/standard/tests/image/getimagesize_swc.phpt
```

Resulted in this output:
```
test skipped
```

But I expected this output instead:
```
test passed
```

To have SWC files (even though they are obsolete), the zlib extension needs to be built statically with PHP. This prevents packages to build a shared zlib extension. As there is now a new API and image types can be dynamically registered from extensions, this can be probably resolved differently as done in the previous pull requests.

See also:
- https://github.com/php/php-src/pull/20867
- https://bugs.php.net/bug.php?id=34338
- https://github.com/php/php-src/pull/4681


### PHP Version

```plain
All PHP versions
```

### Operating System

_No response_