Return the correct exit code of rebuild initrd
    
    Resolves: RHEL-63047
    Upstream: fedora
    Conflict: Yes, due to upstream commit d4e87721 ("kdumpctl:
              make do_estimate more robust") is not backported.
    
    commit f6e00948aba7c31f722af79ed72c4020868dcad7
    Author: Tao Liu <ltao@redhat.com>
    Date:   Fri Oct 18 21:45:03 2024 +1300
    
        Return the correct exit code of rebuild initrd
    
        Resolves: https://issues.redhat.com/browse/RHEL-63047
    
        The exit code of rebuild_initrd() should be either of
        rebuild_kdump/fadump_initrd(), rather than set_vmcore_creation_status(),
        otherwise it will cause a regression when rebuild initrd fails.
    
        Fixes: 88525ebf ("Introduce vmcore creation notification to kdump")
    
        Signed-off-by: Tao Liu <ltao@redhat.com>
    
    Signed-off-by: Tao Liu <ltao@redhat.com>