Webhook: Align values & functions.

[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]

I'm done with aligning the webhook part. Gonna test it by tomorrow.

[Gacko]

I tested those changes on AWS.

[ced0ps]

LGTM