fix(outputs.kafka): Simplify send-error handling (#14154)

(cherry picked from commit fd773b3)

plugins/outputs/kafka/kafka.go

@@ -223,21 +223,21 @@ func (k *Kafka) Write(metrics []telegraf.Metric) error {
 	if err != nil {
 		// We could have many errors, return only the first encountered.
 		var errs sarama.ProducerErrors
-		if errors.As(err, &errs) {
-			for _, prodErr := range errs {
-				if errors.Is(prodErr.Err, sarama.ErrMessageSizeTooLarge) {
-					k.Log.Error("Message too large, consider increasing `max_message_bytes`; dropping batch")
-					return nil
-				}
-				if errors.Is(prodErr.Err, sarama.ErrInvalidTimestamp) {
-					k.Log.Error(
-						"The timestamp of the message is out of acceptable range, consider increasing broker `message.timestamp.difference.max.ms`; " +
-							"dropping batch",
-					)
-					return nil
-				}
-				return prodErr //nolint:staticcheck // Return first error encountered
+		if errors.As(err, &errs) && len(errs) > 0 {
+			// Just return the first error encountered
+			firstErr := errs[0]
+			if errors.Is(firstErr.Err, sarama.ErrMessageSizeTooLarge) {
+				k.Log.Error("Message too large, consider increasing `max_message_bytes`; dropping batch")
+				return nil
 			}
+			if errors.Is(firstErr.Err, sarama.ErrInvalidTimestamp) {
+				k.Log.Error(
+					"The timestamp of the message is out of acceptable range, consider increasing broker `message.timestamp.difference.max.ms`; " +
+						"dropping batch",
+				)
+				return nil
+			}
+			return firstErr
 		}
 		return err
 	}