[itv] remove old extractio method and fix series metadata extraction
[itv] remove old extractio method and fix series metadata extraction

closes #23177
closes #26897

Tatsh/youtube-dl,rg3/youtube-dl,ozburo/youtube-dl,spvkgn/youtube-dl,ozburo/youtube-dl,spvkgn/youtube-dl,rg3/youtube-dl,Tatsh/youtube-dl