AETHER-2075 [5g-control-plane] Fix monitoring target down alerts

Removed Prometheus service monitor annotation and ports for unimplemented NFs.
Also, refactored Service template.

Change-Id: I105e4ae05baf4f819c881c7e1c6b74064b0a7d6b
diff --git a/omec/5g-control-plane/Chart.yaml b/omec/5g-control-plane/Chart.yaml
index cf3681e..edf7f23 100644
--- a/omec/5g-control-plane/Chart.yaml
+++ b/omec/5g-control-plane/Chart.yaml
@@ -8,7 +8,7 @@
 name: 5g-control-plane
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 0.2.19
+version: 0.2.20
 
 dependencies:
   - name: mongodb