feat(codepipeline): change default pipeline type to V2 (under feature flag) (#29096)

### Reason for this change

We discussed about the default pipeline type, it was concluded that the new type (V2) should be the default.

#28538 (comment)

https://github.com/aws/aws-cdk/blob/main/packages/aws-cdk-lib/aws-codepipeline/lib/pipeline.ts#L492

### Description of changes

Change the default value using a feature flag so as not to affect existing processing.

### Description of how you validated changes

Bot unit and integ tests

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

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

Author: go-to-k

packages/@aws-cdk-testing/framework-integ/test/aws-appconfig/test/integ.configuration.ts

@@ -32,7 +32,11 @@ def handler(event, context):
   print('This is my dummy validator')
 `;
 
-const app = new App();
+const app = new App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 
 const stack = new Stack(app, 'aws-appconfig-configuration');
 

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/cloudformation/integ.stacksets.ts

@@ -76,7 +76,11 @@ export class StackSetPipelineStack extends Stack {
   }
 }
 
-const app = new App();
+const app = new App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 const stack = new StackSetPipelineStack(app, 'StackSetPipelineStack');
 new IntegTest(app, 'StackSetPipelineStackInteg', {
   testCases: [stack],

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/integ.cfn-template-from-repo.lit.ts

@@ -3,7 +3,11 @@ import * as codepipeline from 'aws-cdk-lib/aws-codepipeline';
 import * as cdk from 'aws-cdk-lib';
 import * as cpactions from 'aws-cdk-lib/aws-codepipeline-actions';
 
-const app = new cdk.App();
+const app = new cdk.App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 const stack = new cdk.Stack(app, 'aws-cdk-codepipeline-cloudformation');
 
 /// !show

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/integ.lambda-deployed-through-codepipeline.lit.ts

@@ -7,7 +7,11 @@ import * as cdk from 'aws-cdk-lib';
 import * as codepipeline_actions from 'aws-cdk-lib/aws-codepipeline-actions';
 import { STANDARD_NODEJS_RUNTIME } from '../../config';
 
-const app = new cdk.App();
+const app = new cdk.App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 
 /// !show
 const lambdaStack = new cdk.Stack(app, 'LambdaStack');

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/integ.lambda-pipeline.ts

@@ -6,7 +6,11 @@ import * as cdk from 'aws-cdk-lib';
 import * as cpactions from 'aws-cdk-lib/aws-codepipeline-actions';
 import { STANDARD_NODEJS_RUNTIME } from '../../config';
 
-const app = new cdk.App();
+const app = new cdk.App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 
 const stack = new cdk.Stack(app, 'aws-cdk-codepipeline-lambda');
 

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/integ.pipeline-alexa-deploy.ts

@@ -3,8 +3,11 @@ import * as s3 from 'aws-cdk-lib/aws-s3';
 import { App, RemovalPolicy, SecretValue, Stack } from 'aws-cdk-lib';
 import * as cpactions from 'aws-cdk-lib/aws-codepipeline-actions';
 
-const app = new App();
-
+const app = new App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 const stack = new Stack(app, 'aws-cdk-codepipeline-alexa-deploy');
 
 const bucket = new s3.Bucket(stack, 'PipelineBucket', {

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/integ.pipeline-cfn-cross-region.ts

@@ -3,7 +3,11 @@ import * as s3 from 'aws-cdk-lib/aws-s3';
 import * as cdk from 'aws-cdk-lib';
 import * as cpactions from 'aws-cdk-lib/aws-codepipeline-actions';
 
-const app = new cdk.App();
+const app = new cdk.App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 
 const region = 'us-west-2'; // hardcode the region
 const stack = new cdk.Stack(app, 'aws-cdk-codepipeline-cloudformation-cross-region', {

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/integ.pipeline-cfn-with-action-role.ts

@@ -4,7 +4,11 @@ import * as s3 from 'aws-cdk-lib/aws-s3';
 import * as cdk from 'aws-cdk-lib';
 import * as cpactions from 'aws-cdk-lib/aws-codepipeline-actions';
 
-const app = new cdk.App();
+const app = new cdk.App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 
 const stack = new cdk.Stack(app, 'aws-cdk-codepipeline-cloudformation-cross-region-with-action-role', {});
 

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/integ.pipeline-cfn.ts

@@ -4,7 +4,11 @@ import * as s3 from 'aws-cdk-lib/aws-s3';
 import * as cdk from 'aws-cdk-lib';
 import * as cpactions from 'aws-cdk-lib/aws-codepipeline-actions';
 
-const app = new cdk.App();
+const app = new cdk.App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 
 const stack = new cdk.Stack(app, 'aws-cdk-codepipeline-cloudformation');
 

packages/@aws-cdk-testing/framework-integ/test/aws-codepipeline-actions/test/integ.pipeline-code-build-batch.ts

@@ -5,7 +5,11 @@ import * as s3 from 'aws-cdk-lib/aws-s3';
 import * as cdk from 'aws-cdk-lib';
 import * as cpactions from 'aws-cdk-lib/aws-codepipeline-actions';
 
-const app = new cdk.App();
+const app = new cdk.App({
+  postCliContext: {
+    '@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2': false,
+  },
+});
 
 const stack = new cdk.Stack(app, 'aws-cdk-codepipeline-codebuild-batch');