[V1][Bugfix] Fix V1 TP trust-remote-code

[tlrmchlsmth]

When running in V1 with TP:

VLLM_USE_V1=1 VLLM_ENABLE_V1_MULTIPROCESSING=1 vllm serve deepseek-ai/DeepSeek-V2-Lite --tensor-parallel-size 2 --trust-remote-code

This fixes the following error

_pickle.PicklingError: Can't pickle <class 'transformers_modules.deepseek-ai.DeepSeek-V2-Lite.604d5664dddd88a0433dbae533b7fe9472482de0.configuration_deepseek.DeepseekV2Config'>: it's not the same object as transformers_modules.deepseek-ai.DeepSeek-V2-Lite.604d5664dddd88a0433dbae533b7fe9472482de0.configuration_deepseek.DeepseekV2Config

[github-actions]

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[tlrmchlsmth]

@youkaichao you maybe have a better idea but for now I'm marking this ready for review

[youkaichao]

I'm not sure what's wrong here. We might need further investigation.

But I'm good with this change if it solves the issue at present.