(ec2-alpha): Support mapPublicIpOnLaunch prop in SubnetV2

[nick-kang]

Describe the feature

Subnet v1 supports the mapPublicIpOnLaunch prop while SubnetV2 does not. Add support for that prop.

https://github.com/aws/aws-cdk/blob/v2.167.1/packages/aws-cdk-lib/aws-ec2/lib/vpc.ts#L2091-L2097

Use Case

To maintain feature parity with Subnet V1.

mapPublicIpOnLaunch is useful for public asgs templates. https://stackoverflow.com/questions/72285006/how-to-enable-public-ip-addresses-when-using-autoscaling-group-launch-templates

Proposed Solution

No response

Other Information

No response

Acknowledgements

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

CDK version used

2.167.0-alpha.0

Environment details (OS name and version, etc.)

MacOS

[pahud]

related to aws/aws-cdk-rfcs#507