feat(codepipeline): pipeline type v2 option for CDK codepipeline (#29134)

[vumdao]

Issue # (if applicable)

Add CDK codepipeline V2 option of pipeline type

Reason for this change

Some case pipelineType "V2" is more cost effective.

[aws-cdk-automation]

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[aws-cdk-automation]

AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 9e0c9c8
• Result: SUCCEEDED
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[gossandr]

I think the title here may be wrong. This is a feature of pipelines (the "opinionated construct") and not aws-codepipeline.

[aws-cdk-automation]

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[aws-cdk-automation]

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❌ Features must contain a change to a README file.
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