Point Fedora-latest to Fedora 45

Fedora 45 is out. Move the fedora_latest_ref_* and fedora_latest_image_mode_ref_x86_64 anchors from the fedora_44 blocks to the fedora_45 blocks, so Fedora-latest and Fedora-latest-image-mode resolve to Fedora 45.

Switch Fedora 45 from the Prerelease images to the GA ones, Fedora-Cloud-Base-AmazonEC2.{x86_64,aarch64}-45-20261104.0. setup/compose_update_public.py keeps the -Prerelease- part of the image name when it bumps dates, so the scheduled update would never make this switch.

Assisted-by: Claude Code Signed-off-by: Miroslav Vadkerti mvadkert@redhat.com