test: Disable IPv6 masq for IPsec

[1] has all the context. The breakage rose to the surface because in the
previous commit we set KPR=disabled in the 4.19, and iptables started
doing the loadbalancing.

[1]: #23461

Signed-off-by: Martynas Pumputis <m@lambda.lt>

test/k8s/services.go

@@ -196,6 +196,9 @@ var _ = SkipDescribeIf(helpers.RunsOn54Kernel, "K8sDatapathServicesTest", func()
 				deploymentManager.Deploy(helpers.CiliumNamespace, IPSecSecret)
 				DeployCiliumOptionsAndDNS(kubectl, ciliumFilename, map[string]string{
 					"encryption.enabled": "true",
+					// Until https://github.com/cilium/cilium/issues/23461
+					// has been fixed, we need to disable IPv6 masq
+					"enableIPv6Masquerade": "false",
 				})
 				testExternalTrafficPolicyLocal(kubectl, ni)
 				deploymentManager.DeleteAll()