Logs should not be hidden behind a logger.info
Author: LysandreJik
Pull request: yes

Currently the logs that are printed when the global step is a multiple of the `logging_steps` are printed using a `logger.info`. In the case where a user did not set its logging level to INFO, these logs are not shown, even if the user has set a `logging_steps > 0`. This PR fixes that by putting back a print statement.

Closes https://github.com/huggingface/transformers/issues/5901


Comments:
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/6097?src=pr&el=h1) Report
> Merging [#6097](https://codecov.io/gh/huggingface/transformers/pull/6097?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/dafa296c952c08fca3686f1cf8f3a8f8eb116744&el=desc) will **decrease** coverage by `0.31%`.
> The diff coverage is `100.00%`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/6097/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/6097?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #6097      +/-   ##
==========================================
- Coverage   78.80%   78.48%   -0.32%     
==========================================
  Files         146      146              
  Lines       26325    26325              
==========================================
- Hits        20746    20662      -84     
- Misses       5579     5663      +84     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/6097?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/trainer.py](https://codecov.io/gh/huggingface/transformers/pull/6097/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90cmFpbmVyLnB5) | `41.00% <100.00%> (ø)` | |
| [src/transformers/modeling\_tf\_openai.py](https://codecov.io/gh/huggingface/transformers/pull/6097/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl9vcGVuYWkucHk=) | `20.27% <0.00%> (-74.92%)` | :arrow_down: |
| [src/transformers/tokenization\_openai.py](https://codecov.io/gh/huggingface/transformers/pull/6097/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90b2tlbml6YXRpb25fb3BlbmFpLnB5) | `71.21% <0.00%> (-12.88%)` | :arrow_down: |
| [src/transformers/generation\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/6097/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9nZW5lcmF0aW9uX3RmX3V0aWxzLnB5) | `84.71% <0.00%> (-1.76%)` | :arrow_down: |
| [src/transformers/modeling\_openai.py](https://codecov.io/gh/huggingface/transformers/pull/6097/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ19vcGVuYWkucHk=) | `81.02% <0.00%> (-1.29%)` | :arrow_down: |
| [src/transformers/modeling\_reformer.py](https://codecov.io/gh/huggingface/transformers/pull/6097/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ19yZWZvcm1lci5weQ==) | `94.97% <0.00%> (+4.41%)` | :arrow_up: |
| [src/transformers/modeling\_tf\_roberta.py](https://codecov.io/gh/huggingface/transformers/pull/6097/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl9yb2JlcnRhLnB5) | `93.36% <0.00%> (+49.37%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/6097?src=pr&el=continue).
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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/6097?src=pr&el=footer). Last update [dafa296...2f0a5a6](https://codecov.io/gh/huggingface/transformers/pull/6097?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).