[MOE] commit GMM custom operator (#7010)

### What this PR does / why we need it?
GMM custom operator optimization in small batch scenarios

### How was this patch tested?
Submit the GMM custom operator for subsequent integration into the MOE
process.


- vLLM version: v0.16.0
- vLLM main:
15d76f74e2

---------

Signed-off-by: chenxi-hh <chen464822955@163.com>
Signed-off-by: chenxi-hh <32731611+chenxi-hh@users.noreply.github.com>

setup.py

@@ -405,8 +405,10 @@ class cmake_build_ext(build_ext):
             print(f"Copy: {src_cann_ops_custom} -> {dst_cann_ops_custom}")
 
     def run(self):
-        # First, ensure ACLNN custom-ops is built and installed.
-        self.run_command("build_aclnn")
+        if envs.COMPILE_CUSTOM_KERNELS:
+            # First, ensure ACLNN custom-ops is built and installed.
+            self.run_command("build_aclnn")
+
         # Then, run the standard build_ext command to compile the extensions
         super().run()