[Debugger] Fix log snapshot tests

[watson]

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Motivation

The Node.js tracer would fail if the test probe didn't look like a real probe.

Changes

Ensure that the probe sent to the tracer contains a capture object, when captureSnapshot is set to true. This was introduced recently: #5576

This makes the test probe look more like a real probe, since a tracer might expect this object to be present (the Node.js tracer expects this).

If we want to have a system test to validate that tracers can handle the situation where this object isn't present, that should be a dedicated test for that scenario.

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

:rocket: Once your PR is reviewed and the CI green, 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
• [ ] 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