Fix CopySlices logic to ensure wrapped node runs properly. (#89812)
This should remove the failures seen by https://github.com/pytorch/pytorch/pull/89720 in functionalization
Locally verified that running the following on top of this PR does pass: `python benchmarks/dynamo/huggingface.py --accuracy --backend aot_eager --training --only MobileBertForMaskedLM`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89812
Approved by: https://github.com/soumith, https://github.com/voznesenskym, https://github.com/ezyang
