CI: Add Debian 13 to the FULL_OS runner list

This commit adds Debian 13 alias Trixie to the checked operating
systems. The image needs to be run with UEFI support.

Current Debian version overview:
- Debian 11 (Bullseye) -> "oldoldstable"
- Debian 12 (Bookworm) -> "oldstable"
- Debian 13 (Trixie) -> new "stable"

The CI will be run on Debian 12 and Debian 13 now.
Debian 11 is kept, but won't be used automatically.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de>
Closes #17648

.github/workflows/scripts/qemu-2-start.sh

@@ -25,6 +25,10 @@ UBMIRROR="https://cloud-images.ubuntu.com"
 # default nic model for vm's
 NIC="virtio"
 
+# additional options for virt-install
+OPTS[0]=""
+OPTS[1]=""
+
 case "$OS" in
   almalinux8)
     OSNAME="AlmaLinux 8"
@@ -61,6 +65,14 @@ case "$OS" in
     OSNAME="Debian 12"
     URL="https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-generic-amd64.qcow2"
     ;;
+  debian13)
+    OSNAME="Debian 13"
+    # TODO: Overwrite OSv to debian13 for virt-install until it's added to osinfo
+    OSv="debian12"
+    URL="https://cloud.debian.org/images/cloud/trixie/latest/debian-13-generic-amd64.qcow2"
+    OPTS[0]="--boot"
+    OPTS[1]="uefi=on"
+    ;;
   fedora41)
     OSNAME="Fedora 41"
     OSv="fedora-unknown"
@@ -242,7 +254,7 @@ sudo virt-install \
   --network bridge=virbr0,model=$NIC,mac='52:54:00:83:79:00' \
   --cloud-init user-data=/tmp/user-data \
   --disk $DISK,bus=virtio,cache=none,format=raw,driver.discard=unmap \
-  --import --noautoconsole >/dev/null
+  --import --noautoconsole ${OPTS[0]} ${OPTS[1]} >/dev/null
 
 # Give the VMs hostnames so we don't have to refer to them with
 # hardcoded IP addresses.