Add Java Lambda E2E test

[srprash]

Issue description: Run E2E test for Application Signals Java Lambda support

Description of changes:

• Github workflows:
  • Java Lambda Canary - Should be disabled since we haven't released the layers yet.
  • Java Lambda Test - Actual E2E test workflow that is called by the canary or the main build of the ADOT Java repo
  • Java Sample App S3 Deploy - Updated to also uplaod the Java sample app for Lambda testing
• Terraform files - To deploy the APIGW-Lambda integration sample app for E2E testing.
• Validation templates for validating trace, EMF Logs, and Application Signals metrics data.

Testing:

• See this GH action run where I executed the E2E test workflow in a dev branch from another dev branch in the ADOT Java repo.
  • https://github.com/aws-observability/aws-otel-java-instrumentation/actions/runs/12720398142/job/35462971301

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

[mxiamxia]

The workfow looks good to me. Just to double check that do we have the Layer ARN ready in those regionalized release accounts? Otherwise the canaries test won't work

[srprash]

Good point. We don't have the java layers yet. I will disable the canaries for now.