[Bugfix] Fix FunASR-Nano crash during initialization

[SunskyXH]

Purpose

Fix an engine-initialization crash when serving FunASRForConditionalGeneration
(e.g. allendou/Fun-ASR-Nano-2512-vllm) on vLLM >= 0.22 / current main:

NotImplementedError: No language model found in FunASRForConditionalGeneration!

Root cause: #39805 added a get_language_model() call in gpu_model_runner.load_model() to unwrap VLM wrappers into their underlying MoE language model for EPLB. It runs for every non-MoE SupportsMultiModal model and is not guarded by enable_eplb. FunASR never implemented get_language_model(), so it hits the default in interfaces.py, that only scans direct children. FunASR's real LM lives on the nested self.model.decoder (Qwen3Model), not a direct child. So it braeks on vLLM 0.22.0.

Test Plan

Runnign pytest -q tests/models/test_initialization.py -k FunASR will skip the test (seems intentionally added skip flag). So I choose successfully running vllm serve as the prove of correctly initialization.

vllm serve allendou/Fun-ASR-Nano-2512-vllm

Test Result

• Before:

(EngineCore pid=1221367) ERROR 06-01 13:22:52 [core.py:1165]     raise NotImplementedError(
(EngineCore pid=1221367) ERROR 06-01 13:22:52 [core.py:1165] NotImplementedError: No language model found in FunASRForConditionalGeneration! You should initialize it via `_mark_language_model`, and make sure `embed_input_ids` is implemented.

• After:

(APIServer pid=1276487) INFO:     Started server process [1276487]
(APIServer pid=1276487) INFO:     Waiting for application startup.
(APIServer pid=1276487) INFO:     Application startup complete.

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[ywang96]

Thanks for the fix!