Update Helm charts

1. Remove init containers which don't seem to be required
2. Update AMF image

Change-Id: Ib36e9c06f229b982d1825a103e183797191a13ec
diff --git a/omec-sub-provision/Chart.yaml b/omec-sub-provision/Chart.yaml
index eedfdf4..0140bee 100644
--- a/omec-sub-provision/Chart.yaml
+++ b/omec-sub-provision/Chart.yaml
@@ -8,4 +8,4 @@
 name: omec-sub-provision
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 0.5.1
+version: 0.5.2