kdump-lib: clear up references to Atomic/CoreOS
    
    Resolves: bz2174836
    Upstream: Fedora
    Conflict: None
    
    commit 980f10aa40852da41907dc0aeb59ad7d3e8f4c30
    Author: Dusty Mabe <dusty@dustymabe.com>
    Date:   Wed Jun 22 11:58:31 2022 -0400
    
        kdump-lib: clear up references to Atomic/CoreOS
    
        There are many variants on OSTree based systems these days so
        we should probably refer to the class of systems as "OSTree
        based systems". Also, Atomic Host is dead.
    
        Signed-off-by: Dusty Mabe <dusty@dustymabe.com>
        Acked-by: Coiby Xu <coxu@redhat.com>
    
    Signed-off-by: Lichen Liu <lichliu@redhat.com>