Fix missing URL redirection implementation in web engine feeding from KIO
Resulted in broken URLs generated from URL set for pages and the relative URLs used in the pages.
@ltoscano @nicolasfella @heikobecker
Backport candidate for 24.02.2
Resulted in broken URLs generated from URL set for pages and the relative URLs used in the pages.
@ltoscano @nicolasfella @heikobecker
Backport candidate for 24.02.2