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/zfs-qemu.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Generate OS config and CI type
         id: os
         run: |
-          FULL_OS='["almalinux8", "almalinux9", "almalinux10", "centos-stream9", "centos-stream10", "debian11", "debian12", "fedora41", "fedora42", "freebsd13-5r", "freebsd14-3s", "freebsd15-0c", "ubuntu22", "ubuntu24"]'
+          FULL_OS='["almalinux8", "almalinux9", "almalinux10", "centos-stream9", "centos-stream10", "debian12", "debian13", "fedora41", "fedora42", "freebsd13-5r", "freebsd14-3s", "freebsd15-0c", "ubuntu22", "ubuntu24"]'
           QUICK_OS='["almalinux8", "almalinux9", "almalinux10", "debian12", "fedora42", "freebsd14-3s", "ubuntu24"]'
           # determine CI type when running on PR
           ci_type="full"
@@ -63,8 +63,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # rhl:     almalinux8, almalinux9, centos-stream9, fedora41
-        # debian:  debian11, debian12, ubuntu22, ubuntu24
+        # rhl:     almalinux8, almalinux9, centos-stream9, fedora4x
+        # debian:  debian12, debian13, ubuntu22, ubuntu24
         # misc:    archlinux, tumbleweed
         # FreeBSD variants of 2025-06:
         # FreeBSD Release: freebsd13-5r, freebsd14-2r, freebsd14-3r