Maintenance: revert AWS CDK as a development dependency

[heitorlessa]

Why is this needed?

AWS CDK Lib was accidentally upgraded as a runtime dependency.

Which area does this relate to?

Other

Solution

Move back as a development dependency.

Acknowledgment

• This request meets Powertools for AWS Lambda (Python) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Java, TypeScript, and .NET

[github-actions]

This is now released under 2.33.1 version!