feat: add disable-forwarded-header to NIC ConfigMap

[antojacob]

Proposed changes

Implementation PR - nginx/kubernetes-ingress#10539

Checklist

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[medikondasoniya]

Approved

[y82]

Hi @antojacob, thanks for the contribution!
In order for the PR to proceed, you need to accept the the F5 Contributor License Agreement (CLA), by leaving the following message here:

"I have hereby read the F5 CLA and agree to its terms"

Thanks!

[AlexFenlon]

Implementation PR on hold for now, Anto will accept F5 CLA soon but lets not merge this until we are ready

[antojacob]

I have hereby read the F5 CLA and agree to its terms