Maintenance: Fix sub-module skipping for maven central publishing

[phipag]

Summary

We are attempting to publish the powertools-e2e-tests/handlers module to maven central which should not be published.

Example: https://github.com/aws-powertools/powertools-lambda-java/actions/runs/17579484419/job/49933090371

Why is this needed?

We don't want to publish (E2E) test modules.

Which area does this relate to?

Automation

Solution

No response

Acknowledgment

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