ost: downgrade nmstate

workaround for BZ2084118, downgrading nmstate at el9 hosts.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2084118

common/deploy-scripts/setup_host.sh

@@ -22,6 +22,16 @@ if [[ $(which nodectl) ]]; then
     echo 3 > /proc/sys/vm/drop_caches
 fi
 
+# FIXME: work around for BZ 2084118 - Downgrading nmstate
+DISTRO=$( cat /etc/redhat-release )
+if [[ "$DISTRO" == *"9"* ]]; then
+    rpm -e --nodeps nmstate
+    dnf config-manager --set-enabled appstream
+    dnf install -y nmstate-2.0.0-0.4.alpha3.el9
+    echo exclude="nmstate nmstate-plugin-ovsdb python3-libnmstate" >> /etc/dnf/dnf.conf
+    dnf config-manager --set-disabled appstream
+fi
+
 # Set up hugepages
 HUGEPAGES=3
 for node in /sys/devices/system/node/node*; do