Run ovn controller with non root openvswitch user

We recently updated the openvswitch chart to run
ovs db server as non root.

See: https://review.opendev.org/c/openstack/openstack-helm-infra/+/939580

Also ovn-kubernetes script ovnkube.sh that we are using for
lifecycle management of OVN components tries to update the
ownership of OVS run and config directories before start.

So we have to pass the correct username to the script
so it does not break the OVS files permissions.

Change-Id: Ie00dd2657c616645ec237c0880bbc552b3805236

ovn/templates/daemonset-controller.yaml

@@ -110,6 +110,8 @@ spec:
             - ovn-controller
 {{ dict "envAll" . "component" "ovn_controller" "container" "controller" "type" "readiness" "probeTemplate" (include "controllerReadinessProbeTemplate" . | fromYaml) | include "helm-toolkit.snippets.kubernetes_probe" | indent 10 }}
           env:
+            - name: OVS_USER_ID
+              value: {{ .Values.conf.ovs_user_name }}
             - name: OVN_DAEMONSET_VERSION
               value: "3"
             - name: OVN_LOGLEVEL_CONTROLLER

ovn/values.yaml

@@ -82,6 +82,7 @@ conf:
   #   br-private: eth0
   #   br-public: eth1
   auto_bridge_add: {}
+  ovs_user_name: openvswitch
 
 pod:
   # NOTE: should be same as nova.pod.use_fqdn.compute