Fixes actor not being passed to feature flag

What does this MR do and why?

:ml_experiment_tracking is missing the project actor

How to set up and validate locally

1. Enable the feature flag for anyone project:

   Feature.enable(:ml_experiment_tracking, Project.find_by_full_path(<your project path>))

2. Open <your-project>/-/ml/experiments. It should load the page

3. Open <any-other-project>/-/ml/experiments. It should 404

MR acceptance checklist

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