fix(s3): cannot deploy multiple replication source buckets (under fea…

…ture flag) (#33360)

### Issue # (if applicable)

Closes #33355.

### Reason for this change

We cannot deploy multiple source buckets for object replication due to the explicitly set replication role name.

### Description of changes

Set replication role name by `PhysicalName.GENERATE_IF_NEEDED`.

### Describe any new or updated permissions being added

None

### Description of how you validated changes

Update both unit and integ test.

### 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)

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

packages/@aws-cdk-testing/framework-integ/test/aws-s3/test/integ.bucket-cross-account-replication.ts

@@ -2,6 +2,7 @@ import * as cdk from 'aws-cdk-lib';
 import { AwsApiCall, IntegTest } from '@aws-cdk/integ-tests-alpha';
 import * as s3 from 'aws-cdk-lib/aws-s3';
 import { Construct } from 'constructs';
+import { SET_UNIQUE_REPLICATION_ROLE_NAME } from 'aws-cdk-lib/cx-api';
 
 /**
  * Notes on how to run this integ test
@@ -28,7 +29,11 @@ import { Construct } from 'constructs';
  *     - `yarn integ aws-s3/test/integ.bucket-cross-account-replication.js --profiles cross-account`
  * */
 
-const app = new cdk.App();
+const app = new cdk.App({
+  postCliContext: {
+    [SET_UNIQUE_REPLICATION_ROLE_NAME]: false,
+  },
+});
 
 const account = process.env.CDK_INTEG_ACCOUNT || '123456789012';
 const crossAccount = process.env.CDK_INTEG_CROSS_ACCOUNT || '234567890123';