Add support for NLB IPv6 targets groups

[kishorj]

Issue

Description

Add support for NLB IPv6 target groups. The k8s cluster need IPv6 support, as well as the AWS NLB support IPv6 target groups.

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 🌟

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[kishorj]

/test all

[codecov-commenter]

Codecov Report

Merging #2332 (87b4138) into main (e87a5e9) will increase coverage by 0.17%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2332      +/-   ##
==========================================
+ Coverage   53.85%   54.03%   +0.17%     
==========================================
  Files         140      138       -2     
  Lines        7843     7841       -2     
==========================================
+ Hits         4224     4237      +13     
+ Misses       3302     3287      -15     
  Partials      317      317              

Impacted Files	Coverage Δ
pkg/service/model_build_target_group.go	86.51% <100.00%> (+0.80%)	⬆️
pkg/service/model_builder.go	87.95% <100.00%> (+0.61%)	⬆️

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[M00nF1sh]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishorj, M00nF1sh

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• OWNERS [M00nF1sh,kishorj]

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