[Lint]Style: Convert vllm-ascend/ to ruff format(Batch #8) (#6129)

### What this PR does / why we need it?
**Scope of Changes**:
| File Path |
| :--- |
| vllm_ascend/ops/\_\_init\_\_.py |
| vllm_ascend/ops/activation.py |
| vllm_ascend/ops/flashcomm2_oshard_manager.py |
| vllm_ascend/ops/layernorm.py |
| vllm_ascend/ops/mla.py |
| vllm_ascend/ops/mm_encoder_attention.py |
| vllm_ascend/ops/register_custom_ops.py |
| vllm_ascend/ops/vocab_parallel_embedding.py |
| vllm_ascend/ops/weight_prefetch.py |
| vllm_ascend/spec_decode/\_\_init\_\_.py |
| vllm_ascend/spec_decode/eagle_proposer.py |
| vllm_ascend/spec_decode/interface.py |
| vllm_ascend/spec_decode/mtp_proposer.py |
| vllm_ascend/spec_decode/ngram_proposer.py |
| vllm_ascend/spec_decode/suffix_proposer.py |

### Does this PR introduce _any_ user-facing change?

### How was this patch tested?

- vLLM version: v0.13.0
- vLLM main:
d68209402d

Signed-off-by: MrZ20 <2609716663@qq.com>
Signed-off-by: SILONG ZENG <2609716663@qq.com>

vllm_ascend/spec_decode/__init__.py

@@ -30,10 +30,9 @@ def get_spec_decode_method(method, vllm_config, device, runner):
         return EagleProposer(vllm_config, device, runner)
     elif method == "mtp":
         return MtpProposer(vllm_config, device, runner)
-    elif method == 'suffix':
+    elif method == "suffix":
         return SuffixDecodingProposer(vllm_config, device, runner)
     elif method == "medusa":
         return MedusaProposer(vllm_config, device, runner)
     else:
-        raise ValueError("Unknown speculative decoding method: "
-                         f"{method}")
+        raise ValueError(f"Unknown speculative decoding method: {method}")