Bump size of three aarch64 images for bigger EFI system partition
    
    There's a Fedora 39 Change to increase the size of the EFI
    system partition:
    https://fedoraproject.org/wiki/Changes/BiggerESP
    it goes from a size range of 200-600MiB to a size range of
    500MiB-2GiB. The way these aarch64 disk images are built, they
    get the biggest ESP possible, so they're getting a 2GiB ESP,
    up from 600MiB. For these three images, that results in anaconda
    calculating there isn't enough space on the root partition to
    install the package set, and the image creation fails.
    
    Per https://bugzilla.redhat.com/show_bug.cgi?id=2212121
    there's at least a chance this is really how we want things, so
    for now, let's increase the sizes of these images to accommodate
    the bigger ESP. We can revert this if we decide that after all
    the larger ESP is not needed and we want to tweak that somehow.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>