add content part tests for AI Guard in Java

[smola]

Changes

Add support for content parts in AI Guard tests for Java.

Depends on the following PRs:

• add test for ai-guard content parts #6115
• Add support for content parts and image URLs in AI Guard dd-trace-java#10449

APPSEC-60264

Workflow

1. ⚠️ Create your PR as draft ⚠️
2. Work on you PR until the CI passes
3. Mark it as ready for review
   • Test logic is modified? -> Get a review from RFC owner.
   • Framework is modified, or non obvious usage of it -> get a review from R&P team

🚀 Once your PR is reviewed and the CI green, you can merge it!

🛟 #apm-shared-testing 🛟

Reviewer checklist

• Anything but tests/ or manifests/ is modified ? I have the approval from R&P team
• A docker base image is modified?
  • the relevant build-XXX-image label is present
• A scenario is added, removed or renamed?
  • Get a review from R&P team

[github-actions]

CODEOWNERS have been resolved as:

manifests/java.yml                                                      @DataDog/asm-java @DataDog/apm-java
utils/build/docker/java/spring-boot/src/main/java/com/datadoghq/system_tests/springboot/ai_guard/AIGuardController.java  @DataDog/apm-java @DataDog/asm-java @DataDog/system-tests-core

[datadog-official]

✅ Tests

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

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[daniel-romano-DD]

TY!

[jandro996]

LGTM!