Fix IPv6 backend Chainsaw reachability check

Author: komer3

e2e/test/lb-with-ipv6-backends/chainsaw-test.yaml

@@ -77,14 +77,13 @@ spec:
       try:
         - script:
             content: |
-              set -euo pipefail
-              IP=$(kubectl get svc svc-test -n $NAMESPACE -o json | jq -r .status.loadBalancer.ingress[0].ip)
-
+              bash -ce '
+              IP=$(kubectl get svc svc-test -n "$NAMESPACE" -o json | jq -r .status.loadBalancer.ingress[0].ip)
               podnames=()
 
               for i in {1..10}; do
                   if [[ ${#podnames[@]} -lt 2 ]]; then
-                      output=$(curl -s $IP:80 | jq -e .podName || true)
+                      output=$(curl -s "$IP":80 | jq -e .podName || true)
 
                       if [[ "$output" == *"test-"* ]]; then
                           unique=true
@@ -95,7 +94,7 @@ spec:
                               fi
                           done
                           if [[ "$unique" == true ]]; then
-                              podnames+=($output)
+                              podnames+=("$output")
                           fi
                       fi
                   else
@@ -109,6 +108,7 @@ spec:
               else
                   echo "all pods responded"
               fi
+              '
             check:
               ($error == null): true
               (contains($stdout, 'all pods responded')): true