fadump: use 'zstd' as the default compression method
    
    Resolves: bz2139000
    Upstream: Fedora
    Conflict: None
    
    commit f98bd5895e74043430b927828b0bd6944073e0cd
    Author: Hari Bathini <hbathini@linux.ibm.com>
    Date:   Fri Dec 2 18:46:49 2022 +0530
    
        fadump: use 'zstd' as the default compression method
    
        If available, use 'zstd' compression method to optimize the size of
        the initrd built with fadump support. Also, 'squash+zstd' is not
        preferred because more disk space is consumed with 'squash+zstd' due
        to the additional binaries needed for fadump with squash case.
    
        Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
        Acked-by: Tao Liu <ltao@redhat.com>
        Reviewed-by: Philipp Rudo <prudo@redhat.com>
    
    Signed-off-by: Lichen Liu <lichliu@redhat.com>