chore: upgrade otel, removed ut temporarily because of otel API changes (#3795)

core/proc/signals.go

@@ -31,10 +31,7 @@ func init() {
 				dumpGoroutines(fileCreator{})
 			case syscall.SIGUSR2:
 				profiler := StartProfile()
-				go func() {
-					<-time.After(profileDuration)
-					profiler.Stop()
-				}()
+				time.AfterFunc(profileDuration, profiler.Stop)
 			case syscall.SIGTERM:
 				stopOnSignal()
 				gracefulStop(signals, syscall.SIGTERM)

core/service/servicegroup.go

@@ -50,7 +50,7 @@ func (sg *ServiceGroup) Add(service Service) {
 // Also, quitting this method will close the logx output.
 func (sg *ServiceGroup) Start() {
 	proc.AddShutdownListener(func() {
-		logx.Info("Shutting down service in group")
+		logx.Info("Shutting down services in group")
 		sg.stopOnce()
 	})