[LLM] add metrics dumper in background

[SylarTiaNII]

PR types

New features

PR changes

Others

Description

add metrics dumper in background

[paddle-bot[bot]]

Thanks for your contribution!

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 66.66667% with 17 lines in your changes missing coverage. Please review.

Project coverage is 55.19%. Comparing base (50387fd) to head (7a9ce34). Report is 1 commits behind head on incubate/paddlenlp-fleety.

Files with missing lines	Patch %	Lines
paddlenlp/utils/log.py	54.83%	14 Missing :warning:
paddlenlp/trainer/trainer_callback.py	62.50%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## incubate/paddlenlp-fleety #9049 +/- ## ========================================================== Coverage 55.19% 55.19% ========================================================== Files 621 621 Lines 96705 96751 +46 ========================================================== + Hits 53377 53406 +29 - Misses 43328 43345 +17 ```

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