[PERF]: Add one more fast success path (#1656)

This is a follow-on to #1638.  Copilot pointed out
(in the generator code) that I missed one corner case.

Author: mdboom

cuda_bindings/cuda/bindings/runtime.pyx.in

@@ -21465,7 +21465,7 @@ def cudaDeviceRegisterAsyncNotification(int device, callbackFunc, userData):
 
     if err != cyruntime.cudaSuccess:
         return (_cudaError_t(err), None)
-    return (_cudaError_t(err), callback)
+    return (_cudaError_t_SUCCESS, callback)
 {{endif}}
 
 {{if 'cudaDeviceUnregisterAsyncNotification' in found_functions}}