Added updated example for traffic generator

[rafaelpereyra]

What does this PR do?

Adds sample NGINX traffic generator deployment to the repository.

🛑 Please open an issue first to discuss any significant work and flesh out details/direction - we would hate for your time to be wasted. Consult the CONTRIBUTING guide for submitting pull-requests.

Fix #231

Motivation

The current file used for the examples uses a deprecated API, adding the example file in the repository will allow this deployment to succeed.

More

• [x] Yes, I have tested the PR using my local account setup (Provide any test evidence report under Additional Notes)
• [x] Yes, I ran pre-commit run -a with this PR
• [N/A ] Yes, I have added a new example under examples to support my PR (when applicable)
• [x] Yes, I have updated the Pages for this feature

Note: Not all the PRs required examples and docs.

For Moderators

• [ ] E2E Test successfully complete before merge?

Additional Notes

❯ kubectl get ingress --namespace nginx-sample-traffic
NAME                 CLASS    HOSTS                                                                   ADDRESS   PORTS   AGE
ingress-nginx-demo   <none>   ****masked****.us-east-1.elb.amazonaws.com             80      25m