MT#62304 add Websocket Statistics to the monitoring page

* add link to grafana Websocket Statistics dashboard on the
  Monitoring & Statistics UI page

Change-Id: I0a86e619540804940931ab1cc82acfd5e1dbd169
(cherry picked from commit 942cd4cbcb)

share/templates/widgets/admin_topmenu_settings.tt

@@ -31,6 +31,7 @@
         <li><a href="/grafana/d/keydb-statistics?ngcp_grafana_admin=no" class="ngcp-noback-link" target="_blank">[% c.loc('KeyDB Statistics') %]</a></li>
         <li><a href="/grafana/d/victoriametrics?ngcp_grafana_admin=no" class="ngcp-noback-link" target="_blank">[% c.loc('VictoriaMetrics Statistics') %]</a></li>
         <li><a href="/grafana/d/kam-statistics?ngcp_grafana_admin=no" class="ngcp-noback-link" target="_blank">[% c.loc('Kamailio Statistics') %]</a></li>
+        <li><a href="/grafana/d/websocket-statistics?ngcp_grafana_admin=no" class="ngcp-noback-link" target="_blank">[% c.loc('Websocket Statistics') %]</a></li>
         <li><a href="/grafana/d/cluster-overview?ngcp_grafana_admin=no" class="ngcp-noback-link" target="_blank">[% c.loc('Cluster Overview') %]</a></li>
         [% END -%]
         [% IF c.config.features.callflow -%]