Fix chat completion support for multinode (#679)

Author: dmchoiboi

charts/model-engine/templates/service_template_config_map.yaml

@@ -612,6 +612,10 @@ data:
                   - "forwarder.sync.healthcheck_route=${HEALTHCHECK_ROUTE}"
                   - --set
                   - "forwarder.stream.healthcheck_route=${HEALTHCHECK_ROUTE}"
+                  - --set
+                  - "forwarder.sync.extra_routes=${FORWARDER_EXTRA_ROUTES}"
+                  - --set
+                  - "forwarder.stream.extra_routes=${FORWARDER_EXTRA_ROUTES}"
                 {{- $sync_forwarder_template_env | nindent 16 }}
                 readinessProbe:
                   httpGet: