AETHER-1513 Add UPF metrics endpoint and servicemonitor

Change-Id: I96d05ed86516af0a1030da2a313d6555fc29e62e
diff --git a/omec/omec-user-plane/values.yaml b/omec/omec-user-plane/values.yaml
index 60f1448..ab6421f 100644
--- a/omec/omec-user-plane/values.yaml
+++ b/omec/omec-user-plane/values.yaml
@@ -92,3 +92,6 @@
     cpiface:
       # pfcp or zmq
       mode: pfcp
+
+servicemonitor:
+  enabled: false