Maintenance: Update SAM CLI templates to 2.0.0

[phipag]

Summary

We should update the AWS SAM CLI APP templates for Powertools (Java) to use version 2.0.0. The documentation is still pointing to them but it will create a v1 Powertools project.

Actions:

1. Send PR to https://github.com/aws/aws-sam-cli-app-templates/tree/master/java11/hello-pt-maven 2. Update both hello-pt-maven and hello-pt-gradle 3. Set memory to 512 MB 4. Encourage Java 21 usage
2. Update SAM installation section in documentation (https://docs.aws.amazon.com/powertools/java/latest/#install)

Why is this needed?

We don't want to confuse customers getting started with and old version and having to update manually immediately.

Which area does this relate to?

Governance

Solution

No response

Acknowledgment

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