Fix centos/rhel 9/10 dependencies

An error was introduced in [0], it added an incorrect dependency on
genisoimage for nova, and kept a valid dependency on xorriso in n-cpu.
It breaks centos 10 deployments, the expected behavior is to use xorriso
on modern rhel/centos.

[0] https://review.opendev.org/c/openstack/devstack/+/963799

Change-Id: I0057f934c453ded198f8b5e58f4924260a3d2508
Signed-off-by: Gregory Thiemonge <gthiemon@redhat.com>

files/rpms/nova

@@ -1,7 +1,6 @@
 conntrack-tools
 curl
 ebtables
-genisoimage
 iptables
 iputils
 kernel-modules # not:openEuler-22.03
@@ -11,3 +10,4 @@ polkit
 rabbitmq-server # NOPRIME
 sqlite
 sudo
+xorriso