Add ip as an option to listeners

[AlexFenlon]

As an engineer, I would like to have the option to set a specific IP for a listener so that I can create traffic rules for resources with static IP addresses.

Continuation from POC: #5994
Comment from POC giving the output.

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1. Allow for a listener to be defined with the same port, and different IP address

During the implentation of this feature, we discovered that an NGINX restart may be required similar to the examples below:
StackOverflow - When to restart and not reload NGINX
NGINX Ticket - nginx reload doen't support listen interface changes

[github-actions]

Hi @AlexFenlon thanks for reporting!

Be sure to check out the docs and the Contributing Guidelines while you wait for a human to take a look at this 🙂

Cheers!