test(helm): assert custom egress applied to realtime NP too

The prior test claimed coverage of both app and realtime NPs but only
asserted documentIndex 0. Split into two tests so a regression that drops
custom egress from realtime would fail loudly.

Author: waleedlatif1

helm/sim/tests/networkpolicy_test.yaml

@@ -141,7 +141,7 @@ tests:
           path: metadata.name
           value: t-sim-otel-collector
 
-  - it: networkPolicy.egress (custom rules) are appended to both app and realtime NetworkPolicies
+  - it: networkPolicy.egress (custom rules) are appended to the app NetworkPolicy
     set:
       <<: *defaults
       networkPolicy.egress:
@@ -158,3 +158,21 @@ tests:
             ports:
               - protocol: TCP
                 port: 5432
+
+  - it: networkPolicy.egress (custom rules) are appended to the realtime NetworkPolicy
+    set:
+      <<: *defaults
+      networkPolicy.egress:
+        - to: []
+          ports:
+            - protocol: TCP
+              port: 5432
+    documentIndex: 1
+    asserts:
+      - contains:
+          path: spec.egress
+          content:
+            to: []
+            ports:
+              - protocol: TCP
+                port: 5432