Service: Align to upstream.

[Gacko]

Tests on workload clusters (not always required)

For changes in the chart, chart templates, and ingress controller container images, I executed the following tests
to verify them working in live enviromnents:

Test / Provider	AWS	Azure	KVM
Upgrade from previous version	✓	✓
Existing Ingress resources are reconciled correctly	✓	✓
Fresh install	✓	✓
Fresh Ingress resources are reconciled correctly	✓	✓

Testing was done using hello-world-app.

Hint for KVM:

kubectl port-forward -n kube-system svc/nginx-ingress-controller-app 8080:80
ingress_domain=host.configured.in.ingress; curl --connect-to "$ingress_domain:80:127.0.0.1:8080" "http://$ingress_domain" -v

[Gacko]

Note for reviewers: I did not align the change in the service's name nor the way we're deciding wether to add node ports or not. The latter would break KVM and will be aligned once I aligned all non-breaking changes (which can be released in minor releases).

[Gacko]

Did the basic testing on AWS and Azure now, will do some extended testing (migration, new features etc.) on AWS only.

[Gacko]

I literally tested every commit now. Looks good.

[mcharriere]

Looks good in general. I left a small comment about the almost-breaking part of the PR, but approved.