[Java][parametric] add OpenTracing and OpenTelemetry baggage endpoints

[lucaspimentel]

Motivation

Changes

Workflow

1. ⚠️ Create your PR as draft ⚠️
2. Work on you PR until the CI passes (if something not related to your task is failing, you can ignore it)
3. Mark it as ready for review
   • Test logic is modified? -> Get a review from RFC owner. We're working on refining the codeowners file quickly.
   • Framework is modified, or non obvious usage of it -> get a review from R&P team

🚀 Once your PR is reviewed, you can merge it!

🛟 #apm-shared-testing 🛟

Reviewer checklist

• If PR title starts with [<language>], double-check that only <language> is impacted by the change
• No system-tests internal is modified. Otherwise, I have the approval from R&P team
• CI is green, or failing jobs are not related to this change (and you are 100% sure about this statement)
• A docker base image is modified?
  • the relevant build-XXX-image label is present
• A scenario is added (or removed)?
  • Get a review from R&P team

[lucaspimentel]

With Spring, does this baggage persist across multiple requests to the same controller? In the built-in .NET MVC frameworks, a new controller instance is created for each request, so we make them static members in the test apps:

system-tests/utils/build/docker/dotnet/parametric/Endpoints/ApmTestApi.cs

Lines 73 to 74 in 9c26730

	private static readonly Dictionary<ulong, ISpan> Spans = new();
	private static readonly Dictionary<ulong, Datadog.Trace.ISpanContext> DDContexts = new();