How do I make nemo log only on rank 0?
I can't figure out how to make the logging not repeat on 512 ranks. Is there a setting to tell nemo to log only on rank 0? at the very least for the iteration logs?

I currently have:
```
  exp_manager.create_dllogger_logger: True
```
but I'd happy with any other way.

What I ideally would like is the original Megatron-LM-like style logging where it logs iteration metrics from rank 0.

Thank you!

