Documentation update to warn of Access Control bypass when conversion from IPv4 to IPv6 on NLBs

[wilief]

Issue

Documentation update requested in this issue to warn customers of Load Balancer Source Range bypass when converting IPv4 to IPv6 on NLBs.

#2852

Description

Client IP preservation from IPv4 to IPv6 and IPv6 to IPv4 does not take effect and instead sends traffic to the private IP address of the Network Load Balancer.

There was no explicit warning for customers indicating that Load Balancer Source Ranges could be bypassed if IPv4 to IPv6 conversion took place.

https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-target-groups.html#client-ip-preservation

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: wilief / name: Wiliel F (1ea46c9)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @wilief. Thanks for your PR.

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[johngmyers]

/ok-to-test
/lgtm

[kishorj]

/lgtm

[kishorj]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishorj, wilief

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