updated logging and saving metrics
Author: bhadreshpsavani
Pull request: yes

# What does this PR do?

I have updated redundant code for saving and logging metrics in the example scripts

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Fixes #10337 

## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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      Pull Request section?
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- [x] Did you write any new necessary tests?


## Who can review?

@stas00  @sgugger

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Comments:
Please run `make style` and commit to appease to `check_code_quality` CI job