[Triton][Config] Add muls_add triton kernel and refactor AscendCompilationConfig (#5518)

### What this PR does / why we need it?
Add muls_add triton kernel with related fusion pass. What's more, this
PR refactors `AscendCompilationConfig` and delete `NpugraphExConfig`.

### Does this PR introduce _any_ user-facing change?
None

### How was this patch tested?
CI passed with new added test.


- vLLM version: v0.13.0
- vLLM main:
45c1ca1ca1

---------

Signed-off-by: whx-sjtu <2952154980@qq.com>

vllm_ascend/platform.py

@@ -279,7 +279,7 @@ class NPUPlatform(Platform):
 
         if compilation_config.cudagraph_mode == CUDAGraphMode.NONE:
             compilation_config.mode = CompilationMode.NONE
-            ascend_config.npugraph_ex_config.enable = False
+            ascend_config.ascend_compilation_config.enable_npugraph_ex = False
         elif compilation_config.cudagraph_mode == CUDAGraphMode.PIECEWISE:
             logger.info("PIECEWISE compilation enabled on NPU. use_inductor not supported - using only ACL Graph mode")
             assert compilation_config.mode == CompilationMode.VLLM_COMPILE, (
@@ -299,7 +299,7 @@ class NPUPlatform(Platform):
             # not be detected in advance assert.
             compilation_config.splitting_ops.extend(["vllm::mla_forward"])
             update_aclgraph_sizes(vllm_config)
-            ascend_config.npugraph_ex_config.enable = False
+            ascend_config.ascend_compilation_config.enable_npugraph_ex = False
         elif (
             compilation_config.cudagraph_mode == CUDAGraphMode.FULL_DECODE_ONLY
             or compilation_config.cudagraph_mode == CUDAGraphMode.FULL
@@ -328,7 +328,7 @@ class NPUPlatform(Platform):
             )
             compilation_config.cudagraph_mode = CUDAGraphMode.NONE
             compilation_config.mode = CompilationMode.NONE
-            ascend_config.npugraph_ex_config.enable = False
+            ascend_config.ascend_compilation_config.enable_npugraph_ex = False
 
         # TODO: Remove this check when ACL Graph supports ASCEND_LAUNCH_BLOCKING=1
         # Then, we will have to discuss the error handling strategy and user experience