TUN-8052: Update go to 1.21.5

Also update golang.org/x/net and google.golang.org/grpc to fix vulnerabilities,
although cloudflared is using them in a way that is not exposed to those risks

vendor/go.opentelemetry.io/otel/handler.go

@@ -15,60 +15,16 @@
 package otel // import "go.opentelemetry.io/otel"
 
 import (
-	"log"
-	"os"
-	"sync"
+	"go.opentelemetry.io/otel/internal/global"
 )
 
 var (
-	// globalErrorHandler provides an ErrorHandler that can be used
-	// throughout an OpenTelemetry instrumented project. When a user
-	// specified ErrorHandler is registered (`SetErrorHandler`) all calls to
-	// `Handle` and will be delegated to the registered ErrorHandler.
-	globalErrorHandler = defaultErrorHandler()
-
-	// Compile-time check that delegator implements ErrorHandler.
-	_ ErrorHandler = (*delegator)(nil)
-	// Compile-time check that errLogger implements ErrorHandler.
-	_ ErrorHandler = (*errLogger)(nil)
+	// Compile-time check global.ErrDelegator implements ErrorHandler.
+	_ ErrorHandler = (*global.ErrDelegator)(nil)
+	// Compile-time check global.ErrLogger implements ErrorHandler.
+	_ ErrorHandler = (*global.ErrLogger)(nil)
 )
 
-type delegator struct {
-	lock *sync.RWMutex
-	eh   ErrorHandler
-}
-
-func (d *delegator) Handle(err error) {
-	d.lock.RLock()
-	defer d.lock.RUnlock()
-	d.eh.Handle(err)
-}
-
-// setDelegate sets the ErrorHandler delegate.
-func (d *delegator) setDelegate(eh ErrorHandler) {
-	d.lock.Lock()
-	defer d.lock.Unlock()
-	d.eh = eh
-}
-
-func defaultErrorHandler() *delegator {
-	return &delegator{
-		lock: &sync.RWMutex{},
-		eh:   &errLogger{l: log.New(os.Stderr, "", log.LstdFlags)},
-	}
-
-}
-
-// errLogger logs errors if no delegate is set, otherwise they are delegated.
-type errLogger struct {
-	l *log.Logger
-}
-
-// Handle logs err if no delegate is set, otherwise it is delegated.
-func (h *errLogger) Handle(err error) {
-	h.l.Print(err)
-}
-
 // GetErrorHandler returns the global ErrorHandler instance.
 //
 // The default ErrorHandler instance returned will log all errors to STDERR
@@ -78,9 +34,7 @@ func (h *errLogger) Handle(err error) {
 //
 // Subsequent calls to SetErrorHandler after the first will not forward errors
 // to the new ErrorHandler for prior returned instances.
-func GetErrorHandler() ErrorHandler {
-	return globalErrorHandler
-}
+func GetErrorHandler() ErrorHandler { return global.GetErrorHandler() }
 
 // SetErrorHandler sets the global ErrorHandler to h.
 //
@@ -88,11 +42,7 @@ func GetErrorHandler() ErrorHandler {
 // GetErrorHandler will send errors to h instead of the default logging
 // ErrorHandler. Subsequent calls will set the global ErrorHandler, but not
 // delegate errors to h.
-func SetErrorHandler(h ErrorHandler) {
-	globalErrorHandler.setDelegate(h)
-}
+func SetErrorHandler(h ErrorHandler) { global.SetErrorHandler(h) }
 
-// Handle is a convenience function for ErrorHandler().Handle(err)
-func Handle(err error) {
-	GetErrorHandler().Handle(err)
-}
+// Handle is a convenience function for ErrorHandler().Handle(err).
+func Handle(err error) { global.Handle(err) }