[v1] fix parallel config rank

[youkaichao]

#12816 forgot to copy this line of code, and workers cannot get their rank correctly. that information is used in

vllm/vllm/compilation/backends.py

Line 400 in b3942e1

cache_dir, f"rank_{vllm_config.parallel_config.rank}")

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[youkaichao]

should fix #13435 and #13392

[WoosukKwon]

LGTM. Seems to work on my dev box!

[tlrmchlsmth]

Thanks for fixing it!

[youkaichao]

Distributed Tests (2 GPUs) passes now, merging to unblock other PRs.