elbv2: IPv6 only support

[pahud]

Describe the feature

Application Load Balancer launches IPv6 only support for internet clients
https://aws.amazon.com/about-aws/whats-new/2024/05/application-load-balancer-ipv6-internet-clients/

Let's include this support in CDK.

Use Case

For customers using ALB for IPv6 only.

Proposed Solution

Add a new enum with some checks as only ALB support that.

aws-cdk/packages/aws-cdk-lib/aws-elasticloadbalancingv2/lib/shared/enums.ts

Lines 4 to 14 in 8bac15d

	export enum IpAddressType {
	/**
	* Allocate IPv4 addresses
	*/
	IPV4 = 'ipv4',
	/**
	* Allocate both IPv4 and IPv6 addresses
	*/
	DUAL_STACK = 'dualstack',
	}

Other Information

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-elasticloadbalancingv2-loadbalancer.html#cfn-elasticloadbalancingv2-loadbalancer-ipaddresstype

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

all

Environment details (OS name and version, etc.)

all

[go-to-k]

Thanks @pahud
I found the PR for this feature already submitted.

see: #30248

[pahud]

thank you for letting me know @go-to-k

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