Add safe_globals to resume training on PyTorch 2.6

[yafshar]

What does this PR do?

Suggested in huggingface/transformers@1339a14, this is necessary for PyTorch version 2.6.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[yafshar]

@libinta I recommend including this PR in the 1.20 release. It's already present in the future branch but hasn't been integrated into 1.20 yet.

[emascarenhas]

@yafshar , why haven't seen this issue so far. We have been using pytorch 2.6.0.

[yafshar]

@yafshar , why haven't seen this issue so far. We have been using pytorch 2.6.0.

I am not sure. What kind of examples or tests we tried with 2.6. Maybe just luck that the issue did not happen