[GIT-PULLS] [php-src] PR #23395: ext/zip: Change return type of zip_entry_close() to true

Pull Request: https://github.com/php/php-src/pull/23395
Author: lacatoire

`zip_entry_close()` is declared `bool`, but it has no failing return: invalid arguments and resources that are not zip entries throw, and `zend_list_close()` returns void, so the function always ends on `RETURN_TRUE`.

`zip_entry_open()` is deliberately left alone: it ends on `RETURN_BOOL(zr_rsrc->zf != NULL)`, which can genuinely be false, so `bool` is right there. `zip_close()` is already `void`.

`true` being a subtype of `bool`, the only observable change is what Reflection reports. The added test pins both return types so the distinction is not flattened later.