Tracking and Forecasting Eval

[neeharperi]

PR Summary

We add support for tracking and forecasting evaluation to the AV2 Sensor Dataset.

Testing

We evaluate this code against TrackEval and nuScenes detection evaluation to ensure that the outputs are reasonable.

In order to ensure this PR works as intended, it is:

• unit tested.
• other or not applicable (additional detail/rationale required)

Compliance with Standards

As the author, I certify that this PR conforms to the following standards:

• Code changes conform to PEP8 and docstrings conform to the Google Python style guide.
• A well-written summary explains what was done and why it was done.
• The PR is adequately tested and the testing details and links to external results are included.