fix: Requests are forbidden when AllowListedIPRanges parameter is configured

[maniryu]

_Issue #, if available: none

Description of changes:

Fixed to properly handle requests through CloudFront with WAF IP allow list rules

Problem

When configuring the AllowListedIPRanges parameter in the ISB Compute stack, the WAF allowlist rule (IsbAllowListRule) was blocking legitimate requests.
This occurred because the rule was using CloudFront IP addresses for access control instead of the actual client IP addresses.

Solution

• Added ipSetForwardedIpConfig to the IsbAllowListRule in the WAF configuration
• Disable IPv6 for CloudFront distribution

[maniryu]

AWS::CloudFront::Distribution DistributionConfig - AWS CloudFormation
https://docs.aws.amazon.com/ja_jp/AWSCloudFormation/latest/TemplateReference/aws-properties-cloudfront-distribution-distributionconfig.html

In general, you should enable IPv6 if you have users on IPv6 networks who want to access your content. However, if you're using signed URLs or signed cookies to restrict access to your content, and if you're using a custom policy that includes the IpAddress parameter to restrict the IP addresses that can access your content, don't enable IPv6.

[aws-khargita]

Thanks for opening this PR! Our process requires us to merge code to our internal repository to publish the pre-synthesized cloudformation templates and GH release, unfortunately that means we cannot merge this PR directly in GH. As an OS project we still absolutely encourage devs to submit PRs so I do not want to deter you from contributing further. We will incorporate this into the next release and attribute you with credit in the changelog. Thanks again for contributing!