Specify tensorboard logging in BART finetuning
Allows you to specify the directory in which to store tensorboard logs when running the BART finetuning script. 

Issue: #4349

You may also need to rebase to fix `check_code_quality`.
Also `run_examples_torch` will only pass if it doesn't add new dependencies.<|||||>This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.
