feat(ec2): support for IPv6 on Client VPN Endpoint

[juliansweatt]

Issue # (if applicable)

None

Reason for this change

Client VPN Endpoints support IPv6 configuration (https://docs.aws.amazon.com/vpn/latest/clientvpn-admin/ipv6-considerations.html) but this has not been added to the L2 construct yet.

Description of changes

Add endpointIpAddressType and trafficIpAddressType parameters to ClientVpnEndpointProps

Describe any new or updated permissions being added

None

Description of how you validated changes

Added unit and integration tests.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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

[github-actions]

👋 It looks like your PR description follows the template but is missing a valid issue number in the first section.

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[github-actions]

⚠️ Experimental Feature: This security report is currently in experimental phase. Results may include false positives and the rules are being actively refined.
This security report is NOT a review blocker. Please try merge from main to avoid findings unrelated to the PR.
To suppress a specific rule, see Suppressing Rules.

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	Tests	Passed ✅	Skipped	Failed
Security Guardian Results	48 ran	48 passed

Test	Result
No test annotations available

• View Security Guardian Results

[github-actions]

⚠️ Experimental Feature: This security report is currently in experimental phase. Results may include false positives and the rules are being actively refined.
This security report is NOT a review blocker. Please try merge from main to avoid findings unrelated to the PR.
To suppress a specific rule, see Suppressing Rules.

---

	Tests	Passed ✅	Skipped	Failed
Security Guardian Results with resolved templates	48 ran	48 passed

Test	Result
No test annotations available

• View Security Guardian Results with resolved templates