[Fusion] [Graph] Add qknorm rope fusion operator (#4711)

### What this PR does / why we need it?
This PR add `qkv_rmsnorm_rope` operator and introduces a graph fusion
pass for `qknorm_rope` operations. The implementation includes a new
configuration flag, a pattern matching pass using
`torch._inductor.pattern_matcher`, and a custom Triton kernel for the
fused operation.

Co-authored-by: Angazenn
[supperccell@163.com](mailto:supperccell@163.com)

### Does this PR introduce _any_ user-facing change?
Yes, add new additional_config

- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c

---------

Signed-off-by: wxsIcey <1790571317@qq.com>

vllm_ascend/ascend_config.py

@@ -17,6 +17,7 @@ from typing import Optional
 from uuid import uuid4
 
 from vllm.logger import logger
+from vllm.triton_utils import HAS_TRITON
 
 
 def check_kv_extra_config(vllm_config):
@@ -231,7 +232,10 @@ class AscendCompilationConfig:
     deployed on Ascend platforms.
     """
 
-    def __init__(self, fuse_norm_quant: bool = True, **kwargs):
+    def __init__(self,
+                 fuse_norm_quant: bool = True,
+                 fuse_qknorm_rope: bool = False,
+                 **kwargs):
         """
         Initialize the configuration.
         
@@ -239,11 +243,12 @@ class AscendCompilationConfig:
             fuse_norm_quant (bool): Whether to enable norm and quant fusion optimization.
                 When set to True, the system will optimize norm and quant operations.
                 Default: True
-                
+            fuse_qknorm_rope (bool): Whether to enable qknorm and rope fusion optimization.
+                Default: False
             **kwargs: Additional optional parameters for forward compatibility and configuration extension.
         """
         self.fuse_norm_quant = fuse_norm_quant
-        # Add more compilation related configs here as needed
+        self.fuse_qknorm_rope = HAS_TRITON or fuse_qknorm_rope
 
 
 class XliteGraphConfig: