[Feat] Add worker interface "update_config"

[ivyilike]

What this PR does / why we need it?

Some worker interfaces called by vLLM are missing in vLLM Ascend. It's good to add the support.
this PR add support to "update_config" interface. Update config in model_runner_v1.
For example, collective_rpc("update_config", overrides={"load_config": {"load_format": "auto"}})

• vLLM version: v0.11.0
• vLLM main: vllm-project/vllm@2918c1b

[github-actions]

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[gemini-code-assist]

Code Review

This pull request introduces an update_config interface to the worker, allowing for dynamic configuration updates. The implementation is straightforward, adding the method to NPUWorker and NPUModelRunner, along with a corresponding unit test. My main feedback is to replace the use of assert for input validation with a ValueError to ensure robustness, as assertions can be disabled. This change also requires a small update to the new test case.

[gemini-code-assist]

Using assert for input validation is not recommended as assertions can be disabled with the -O Python flag, which would lead to this check being skipped. It's more robust to raise a ValueError for invalid configuration keys.

Additionally, sorting the allowed_config_names in the error message will ensure deterministic output, which is good practice.

Note that this change will require updating test_update_config to expect a ValueError.

Suggested change

	assert config_name in allowed_config_names, \
	f"Config `{config_name}` not supported. " \
	f"Allowed configs: {allowed_config_names}"
	if config_name not in allowed_config_names:
	allowed = sorted(list(allowed_config_names))
	raise ValueError(f"Config `{config_name}` not supported. Allowed: {allowed}")

[gemini-code-assist]

To align with the recommended change of raising a ValueError for invalid inputs in NPUModelRunner.update_config, this test should be updated to expect a ValueError.

Suggested change

	with pytest.raises(AssertionError):
	with pytest.raises(ValueError):

[xueliangyang-oeuler]

good job ！