fix(elasticloadbalancingv2): open ALB using DUAL_STACK_WITHOUT_PUBLIC_IPV4 allows IPv6 inbound traffic

[clareliguori]

Issue

Closes #32197

Reason for this change

Description of changes

Description of how you validated changes

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.18%. Comparing base (49b5afd) to head (8f2615d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #32201   +/-   ##
=======================================
  Coverage   77.18%   77.18%           
=======================================
  Files         105      105           
  Lines        7161     7161           
  Branches     1312     1312           
=======================================
  Hits         5527     5527           
  Misses       1454     1454           
  Partials      180      180           

Flag	Coverage Δ
suite.unit	77.18% <ø> (ø)

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Components	Coverage Δ
packages/aws-cdk	77.18% <ø> (ø)

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[aws-cdk-automation]

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AWS CodeBuild CI Report

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• Result: SUCCEEDED
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