Fix the aws_s3 input warning for missing files

This is a refinement of the fix in #3221. I somehow missed that
the warning message would only get printed for a single discovered
object since we could get multiple paths from SQS, but we only
send a single ack after all the objects are processed.

Signed-off-by: Mihai Todor <todormihai@gmail.com>

Author: mihaitodor

internal/impl/aws/input_s3.go

@@ -583,6 +583,7 @@ func (s *sqsTargetReader) readSQSEvents(ctx context.Context) ([]*s3ObjectTarget,
 						keyNotFound := false
 						if apiErr := smithy.APIError(nil); errors.As(err, &apiErr) {
 							if _, ok := apiErr.(*s3types.NoSuchKey); ok {
+								s.log.Warnf("Dropping SQS notification for missing key %q: %s", object.key, err)
 								keyNotFound = true
 							}
 						}
@@ -603,9 +604,6 @@ func (s *sqsTargetReader) readSQSEvents(ctx context.Context) ([]*s3ObjectTarget,
 						} else {
 							ackOnce.Do(func() {
 								if atomic.AddInt32(&pendingAcks, -1) == 0 {
-									if keyNotFound {
-										s.log.Warnf("Dropping SQS notification for missing key %q: %s", object.key, err)
-									}
 									aerr = s.ackSQSMessage(ctx, sqsMsg)
 								}
 							})