Support for "upload" action for metriq-gym result

Right now, the user can dispatch, poll, and list jobs. We should support an upload workflow that looks like:

```
python metriq_gym/run.py upload --job_id <METRIQ_GYM_JOB_ID>
```

We can use the `metriq_metadata.py` to cross-reference the metriq.info IDs tied to the benchmark in question.