Update tpu_worker_jax.py

[fenyuan-gg]

update the location of init_cached_hf_modules

Description

Start with a short description of what the PR does and how this is a change from
the past.

the location seems changed in the vllm side. Make this change so --trust_remote_code can work.

Checklist

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• I have performed a self-review of my code.
• I have necessary comments in my code, particularly in hard-to-understand areas.
• I have made or will make corresponding changes to any relevant documentation.