[php-src] PR #24044: Zend: Copy the va_list per callback in zend_llist_apply_with_arguments()

Pull Request: https://github.com/php/php-src/pull/24044 Author: iliaal zend_llist_apply_with_arguments() handed one va_list to every callback, so after the first callback consumed it with va_arg() the next one read past the arguments on ABIs where va_list is an array type, such as x86-64 SysV. Its only in-tree caller is zend_extension_dispatch_message(), so when an extension registers, the second already-loaded zend_extension with a message_handler gets a garbage message and arg. Each callback now gets its own va_copy(); zend_hash_apply_with_arguments() already avoids this by calling va_start() per element.