[devctl] make sure i18ncube always delete its tempdir
closes #15613724
Document: cubicweb-docTitle: CubicWeb documentationAuthor: LogilabAbstract: Some base documentation for CubicWeb users and developpersSection: Apps/ProgrammingFormat: HTMLIndex: /usr/share/doc/cubicweb-documentation/html/index.htmlFiles: /usr/share/doc/cubicweb-documentation/html/*