Add support for Azure Linux
Support both the legacy Mariner 2 EFI layout, with the shim located at /EFI/BOOT/bootx64.efi, as well as the new Azure Linux 3.0 EFI layout, with the shim located at /EFI/azurelinux/shimx64.efi
Support both the legacy Mariner 2 EFI layout, with the shim located at /EFI/BOOT/bootx64.efi, as well as the new Azure Linux 3.0 EFI layout, with the shim located at /EFI/azurelinux/shimx64.efi