[Sync EN] ext/spl, ext/sqlite3: document typed class constants (PHP 8.4)

[github-actions]

PR: https://github.com/php/doc-en/pull/5736 (2026-08-07)

Файлы RU для обновления

• language-snippets.ent
• reference/spl/arrayiterator.xml
• reference/spl/arrayobject.xml
• reference/spl/cachingiterator.xml
• reference/spl/filesystemiterator.xml
• reference/spl/multipleiterator.xml
• reference/spl/recursivearrayiterator.xml
• reference/spl/recursiveiteratoriterator.xml
• reference/spl/recursivetreeiterator.xml
• reference/spl/regexiterator.xml
• reference/spl/spldoublylinkedlist.xml
• reference/spl/splfileobject.xml
• reference/spl/splpriorityqueue.xml
• reference/sqlite3/sqlite3.xml