[Feat]mtp aclgraph support (#3244)

### What this PR does / why we need it?
Currently, MTP Model in deepseek can not be capture in ACLGraph. This PR
is use to allow MTP to be captured in ACLGraph mode.

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

### How was this patch tested?


- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

Signed-off-by: anon189Ty <Stari_Falcon@outlook.com>

vllm_ascend/spec_decode/ngram_proposer.py

@@ -1,4 +1,5 @@
 import torch
+from vllm.config import CUDAGraphMode
 from vllm.v1.spec_decode.ngram_proposer import \
     NgramProposer as VllmNgramProposer
 
@@ -23,7 +24,9 @@ class NgramProposer(VllmNgramProposer, Proposer):
                   with_prefill=None,
                   skip_attn=None,
                   num_reqs=None,
-                  num_tokens_across_dp=None):
+                  num_tokens_across_dp=None,
+                  aclgraph_runtime_mode: CUDAGraphMode = CUDAGraphMode.NONE,
+                  batch_descriptor=None):
         pass
 
     def generate_token_ids(self,