Support PyTorch 2.1.0

[Seventeen17]

What does this PR do:

Fixing compatibility issues with PyTorch versions above 2.1.0, corresponding issue: #79

Does your PR introduce any breaking changes? If yes, please list them:
ProxyVariableHooks::basic_autograd_not_implemented_fallback

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[Seventeen17]

@H-Huang Could you please help me check what's wrong with runners?

[gouchangjiang]

Hi @Seventeen17 thank you for adding this PR. I managed to install the torchdistx with your PR. However, I failed to initialize the 65B model with FSDP. Did you manage to initialize a large model? Thanks in advance for your kindness.

[gouchangjiang]

@Seventeen17 I managed to train the large model. Thanks again for your contribution.

[Seventeen17]

Hi @Seventeen17 thank you for adding this PR. I managed to install the torchdistx with your PR. However, I failed to initialize the 65B model with FSDP. Did you manage to initialize a large model? Thanks in advance for your kindness.

I applied this fix to successfully initialize and train 65B model in PyTorch/XLA FSDP, but it also need some fix in PyTorch/XLA FSDP.