Resolve 'NoneType' object has no attribute 'gate_proj' err when applying EP in DeepSeek-V2

[IT-Forrest]

Resolve the error of no gate_proj attribute during the Expert Parallelism of DeepSeek-V2

What does this PR do?

Fixes # (issue)

Currently, EP doesn't work in the latest OH main. It fails with the following error

[rank3]:     self.experts[idx * self.expert_chunk + i].gate_proj.weight.squeeze() for i in experts_range
[rank3]: AttributeError: 'NoneType' object has no attribute 'gate_proj'

This PR will resolve the Error by skipping the NonType object

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?

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[regisss]

LGTM!