fix issue that some example with no trainer use accelerator.end_train…

[we1559]

…ing in a wrong way

What does this PR do?

Fixes # (issue)
fix issue#37434
@ArthurZucker hi, I think you should review this PR as I fix some issue with the text models examples.

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[Rocketknight1]

cc @SunMarc, lmk if you're happy with the change and feel free to merge if you are!