revert: feat(cli): cdk rollback (#31407)

[shikha372]

Issue # (if applicable)

Closes #31654.

Reason for this change

This reverts commit 0755561.

Description of changes

Changes introduced regression in amplify app for nested stacks, reverting it.

Description of how you validated changes

Validated with local build

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

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

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➡️ PR build request submitted to test-main-pipeline ⬅️

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✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 3f49b8a
• Result: SUCCEEDED
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