Fix load of rng state for resuming training from checkpoint
Author: winglian
Pull request: yes

# What does this PR do?
Fixes a regression from https://github.com/huggingface/transformers/pull/36991 whereby resuming training from a checkpoint would fail when attempting to load the rng state. The regression only affects torch versions < 2.6.0.

see https://github.com/axolotl-ai-cloud/axolotl/actions/runs/14185726834/job/39740935566 

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## Who can review?

@zach-huggingface and @SunMarc

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Comments:
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Would consider fix this issue

> Would consider fix this issue

Thx for the reminder !