chore(ci): Fix e2e tests in v3 branch

[leandrodamascena]

Expected Behaviour

End-2-end tests working.

Current Behaviour

End-2-end tests are failing on the v3 branch because Pydantic v2 has become the default version and our tests are still considering Pydantic v1.

Code snippet

No code snippet

Possible Solution

No response

Steps to Reproduce

Fix tests to be complaint with Pydantic v2.

Powertools for AWS Lambda (Python) version

v3

AWS Lambda function runtime

3.12

Packaging format used

PyPi

Debugging logs

No response