[Java] Adaptive sampling test case

[majanjua-amzn]

Description

Adding a test case for an account that is using adaptive sampling.

• RuleA in this account accepts traffic from the main service and has a sampling rate of 0% with 0/s reservoir, but has adaptive sampling configured.
• RuleB accepts traffic from the remote service and has 0% sampling rate, 0/s reservoir, and no boost configuration
• The main service defines a dummy anomaly condition to ensure it does not perform any boosting on its own
• The remote service has a local configuration defining 500 response code errors as anomalies which will trigger boost in RuleA

Changes

• Added test file for new case that uses a static version of ADOT that is saved in an S3 bucket in the account - this will be updated later
• Terraform templates are added for the new test case, applying adaptive sampling configurations to the applications as needed on top of the regular boilerplate application deployment instructions
• A unique traffic generation script was added to ensure we have control over the anomaly rate and sampling that occurs in this account
• Trace validation is updated to allow for partial traces to be searched for in the account and validated
• Expected data templates and validation configs added for the new test cases

Risks

• Will cause a build failure in ADOT Java's "Validate E2E Tests Are Accounted For" as this test is not currently included there, I will follow up this PR with an exclusion for this test in the meantime
• No risk of alarms, etc., as this PR is a new test with minimal change to shared logic

Testing

https://github.com/aws-observability/aws-application-signals-test-framework/actions/runs/16893409299

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