[fix] SetShutdown error_closure_ properly (#32991)

Spin off from https://github.com/grpc/grpc/pull/32701.

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src/core/lib/event_engine/posix_engine/ev_epoll1_linux.cc

@@ -349,7 +349,7 @@ void Epoll1EventHandle::HandleShutdownInternal(absl::Status why,
       }
     }
     write_closure_->SetShutdown(why);
-    write_closure_->SetShutdown(why);
+    error_closure_->SetShutdown(why);
   }
 }