Revert "Disable zchunk metadata creation for now"
    
    Now that zchunk-1.1.0 and libcurl-7.64.0-5 are in rawhide
    lets give it a try again.
    
    https://pagure.io/dusty/failed-composes/issue/1703#comment-562223
    https://bugzilla.redhat.com/show_bug.cgi?id=1690971#c6
    
    This reverts commit c723442a3e5d283444151e1b10074d330d28ded4.
    
    Signed-off-by: Mohan Boddu mboddu@bhujji.com