Adds feature decorator for symbol database

[tylfin]

Motivation

This pull request introduces new functionality to support the debugger_symdb feature in the test framework. The most significant changes include adding a new feature marker and updating the Test_Debugger_SymDb class to use this new feature.

Changes

• tests/debugger/test_debugger_symdb.py: Added the @features.debugger_symdb decorator to the Test_Debugger_SymDb class to enable tests for the new debugger symbol database feature.

• utils/_features.py: Introduced a new static method debugger_symdb in the _features class to mark tests with the feature ID 370, facilitating the probing of budgets for the debugger symbol database.

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