kdumpctl: Add basic UKI support
    
    Resolves: bz2169720
    Upstream: src.fedoraproject.org/rpms/kexec-tools.git
    Conflicts: Small context difference in kexec-tools.spec
    
    commit ea7be0608ed719cc1cb134ecf6ef51a4b7e9f104
    Author: Philipp Rudo <prudo@redhat.com>
    Date:   Fri May 5 17:14:42 2023 +0200
    
        kdumpctl: Add basic UKI support
    
        A Unified Kernel Image (UKI) is a single EFI PE executable combining an
        EFI stub, a kernel image, an initrd image, and the kernel command line.
        They are defined in the Boot Loader Specification [1] as type #2
        entries. UKIs have the advantage that all code as well as meta data that
        is required to boot the system, not only the kernel image, is combined
        in a single PE file and can be signed for EFI SecureBoot. This extends
        the coverage of SecureBoot extensively.
    
        For RHEL support for UKI were included into kernel-ark with 16c7e3ee836e
        ("redhat: Add sub-RPM with a EFI unified kernel image for virtual
        machines").
    
        There are two problems with UKIs from the kdump point of view at the
        moment. First, they cannot be directly loaded via kexec_file_load and
        second, the initrd included isn't suitable for kdump. In order to enable
        kdump on systems with UKIs build the kdump initrd as usual and extract
        the kernel image before loading the crash kernel.
    
        [1] https://uapi-group.org/specifications/specs/boot_loader_specification/
    
        Signed-off-by: Philipp Rudo <prudo@redhat.com>
        Reviewed-by: Pingfan Liu <piliu@redhat.com>
        Reviewed-by: Coiby Xu <coxu@redhat.com>
    
    Signed-off-by: Philipp Rudo <prudo@redhat.com>
    Signed-off-by: Tao Liu <ltao@redhat.com>