[Trainer] Add nan/inf logging filter
Author: patrickvonplaten
Pull request: yes

# What does this PR do?

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Some losses sometimes produce `inf` losses which however doesn't necessarily mean that the training went bad. When using the CTC loss for speech recognition - see: https://github.com/huggingface/transformers/pull/13620 this is often the case. The problem is that as soon as one single loss step is `inf` or `nan` the rest of the training logs will display `inf` or `nan`. In this PR a flag is added that allows the user to filter out `nan` and `inf` values for training. It defaults to `False` and will be set to `True` in all CTC training scripts.


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Comments:
Happy to let it default to True!