CI: Move failing job to experimental queue

The kayobe-seed-images-rocky9 job is currently failing during IPA build:

    qemu-img: error while reading at byte 6186729472: Input/output error

Move it to the experimental queue for now.

Change-Id: Ib20bd2c60093f16dec1a663f0ddac4ac8bb464d8
Signed-off-by: Pierre Riteau <[email protected]>
(cherry picked from commit fb259e9)

Author: priteau

zuul.d/project.yaml

@@ -29,7 +29,6 @@
         - kayobe-seed-rocky9-podman
         - kayobe-seed-ubuntu-noble
         - kayobe-seed-ubuntu-noble-podman
-        - kayobe-seed-images-rocky9
         - kayobe-seed-upgrade-rocky9
         - kayobe-seed-upgrade-ubuntu-noble
         - kayobe-seed-upgrade-slurp-rocky9
@@ -76,6 +75,7 @@
         - kayobe-overcloud-centos9s
         - kayobe-overcloud-host-configure-centos9s
         - kayobe-seed-images-centos9s
+        - kayobe-seed-images-rocky9
         - kayobe-seed-images-rocky9-podman
         - kayobe-seed-images-ubuntu-noble
         - kayobe-seed-images-ubuntu-noble-podman