container-toolbox: Exclude glibc-langpack-en
    
    The fedora-toolbox OCI image already includes the glibc-all-langpacks
    RPM that ships a pre-built /usr/lib/locale/locale-archive file with all
    the locale definitions built in.
    
    The glibc-langpack-en RPM provides definitions for all the en_* locales
    in per-locale sub-directories in /usr/lib/locale.  This is a subset of
    glibc-langpack-en, even if it uses a different representation, and hence
    not necessary at all.
    
    For some reason, glibc-langpack-en is present in the fedora-toolbox:39
    image, but not in the images for Fedora 40 and 41.  Therefore, it's
    better to be explicit about it as a safeguard against any inadvertent
    changes.
    
    https://pagure.io/fedora-kickstarts/pull-request/1028