DMS Helm doesn't work with Cilium's L2 LB

[furstblumier]

If you use the dms helm chart while also using Cilium's L2 LB, you need to set externalTrafficPolicy to "Cluster", see here.
This is fine, since you also replace kubeProxy in that setup, so you can preserve the original IP without having to use the proxy protocol. I'm aware that this is probably a more exotic/advanced use-case, but also quite trivial to implement. I'll follow up with a PR that implements the feature with a hopefully sane default.