fix: handle new F41 selinux policies for sulogin-generator

Remove our in-repo copy of `ublue-sulogin-generator` and replace with
the current version from CoreOS. This way we will stay in sync with that
as an upstream, and comply with new Fedora 41 SElinux policy.

Safe for F39/F40 as well.

Fixes: #653

install.sh

@@ -66,6 +66,12 @@ fi
 ## install packages direct from github
 /ctx/github-release-install.sh sigstore/cosign x86_64
 
+# use CoreOS' generator for emergency/rescue boot
+# see detail: https://github.com/ublue-os/main/issues/653
+CSFG=/usr/lib/systemd/system-generators/coreos-sulogin-force-generator
+curl -sSLo ${CSFG} https://raw.githubusercontent.com/coreos/fedora-coreos-config/refs/heads/stable/overlay.d/05core/usr/lib/systemd/system-generators/coreos-sulogin-force-generator
+chmod +x ${CSFG}
+
 if [[ "${KERNEL_VERSION}" == "${QUALIFIED_KERNEL}" ]]; then
     /ctx/initramfs.sh
 fi