[pull] master from php:master - #1257
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php_dom_xpath_callbacks_dtor() freed php_ns and each namespaces entry while leaving registry->php_ns and registry->namespaces pointing at them, and it then destroyed node_list, which runs node destructors. A destructor calling gc_collect_cycles() therefore reached php_dom_xpath_callback_ns_get_gc() through the still-set fields and iterated freed memory. Reachable from userland by calling DOMXPath::__construct() a second time on an object that has php:function registrations and a populated node list. Closes GH-23621
* PHP-8.4: dom: clear the xpath callback registrations before freeing them
* PHP-8.5: dom: clear the xpath callback registrations before freeing them
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