[Bugfix] Fix VLLMNotFoundError when using LoRA adapter name in poolin…

[wanghenshui]

…g/embed endpoint

--runner pooling with --lora-modules, access lora adapter return 404,

sync with OpenAIServing._maybe_get_adapters

introduced by #36110

Purpose

Test Plan

Test Result

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[wanghenshui]

ntrypoints/serve/lora/test_serving_models.py::test_pooling_maybe_get_adapters_lora_name_sets_lora_request PASSED
entrypoints/serve/lora/test_serving_models.py::test_pooling_maybe_get_adapters_unknown_model_raises PASSED

[noooop]

Thanks for your fix.