### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

If the Lambda returns an error, the message is put into DLQ straightaway after first try **although** the configurations says "try 3 times".

### Expected Behavior

If the Lambda returns an error, the message should be put into DLQ after what `RedrivePolicy.maxReceiveCount` says which is 3 in this case. For instance, try processing the message 3 times, if still no success, put it into DLQ.

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

```yaml
version: "3.8"

services:
  localstack:
    image: "localstack/localstack"
    container_name: "localstack"
    ports:
      - "4566-4599:4566-4599"
    environment:
      - DEBUG=1
      - DEFAULT_REGION=eu-west-1
      - SERVICES=lambda,events,sqs
      - DATA_DIR=/tmp/localstack/data
      - DOCKER_HOST=unix:///var/run/docker.sock
      - LAMBDA_EXECUTOR=docker
    volumes:
      - "./tmp/localstack:/tmp/localstack"
      - "/var/run/docker.sock:/var/run/docker.sock"
```

### Environment

```markdown
- OS: MacOS BigSur
- LocalStack: `1dc090777b0c`
```


### Anything else?

This will try **only once** and put the message into DLQ after failure **although** the retry policy instructs for **3 retries**. This is the issue.

```bash
aws --profile localstack --endpoint-url http://localhost:4566 lambda create-function \
    --function-name api-lambda \
    --handler lambda/main \
    --runtime go1.x \
    --role api-role \
    --zip-file fileb://lambda.zip
    
aws --profile localstack --endpoint-url http://localhost:4566 sqs create-queue \
    --queue-name api-dead-letter-queue

aws --profile localstack --endpoint-url http://localhost:4566 sqs create-queue \
    --queue-name api-queue \
    --attributes '{"RedrivePolicy":"{\"deadLetterTargetArn\":\"arn:aws:sqs:eu-west-1:000000000000:api-dead-letter-queue\",\"maxReceiveCount\":\"3\"}"}'

aws --profile localstack --endpoint-url http://localhost:4566 lambda create-event-source-mapping \
    --function-name api-lambda \
    --event-source-arn arn:aws:sqs:eu-west-1:000000000000:api-queue
```

Use this command to test.

```bash
aws --profile localstack --endpoint-url http://localhost:4566 sqs send-message \
    --queue-url http://localhost:4566/000000000000/api-queue \
    --message-body '{"hello":"world"}'
```

----

FYI - This will try **indefinitely** (_30 sec in between_) until it succeeds because there is **no** retry policy set which is perfectly normal and expected behaviour.

```bash
aws --profile localstack --endpoint-url http://localhost:4566 lambda create-function \
    --function-name api-lambda \
    --handler lambda/main \
    --runtime go1.x \
    --role api-role \
    --zip-file fileb://lambda.zip
    
aws --profile localstack --endpoint-url http://localhost:4566 sqs create-queue \
    --queue-name api-dead-letter-queue

aws --profile localstack --endpoint-url http://localhost:4566 sqs create-queue \
    --queue-name api-queue

aws --profile localstack --endpoint-url http://localhost:4566 lambda create-event-source-mapping \
    --function-name api-lambda \
    --event-source-arn arn:aws:sqs:eu-west-1:000000000000:api-queue
```
result_send = sqs_client.send_message(QueueUrl=queue_url, MessageBody="test")
        result_recv1_messages = sqs_client.receive_message(QueueUrl=queue_url).get("Messages")
        result_recv2_messages = sqs_client.receive_message(QueueUrl=queue_url).get("Messages")
        # on
        assert (result_recv1_messages is None) != (result_recv2_messages is None)
        assert poll_condition(
            lambda: "Messages" in sqs_client.receive_message(QueueUrl=dl_queue_url), 5.0, 1.0
        )
        assert (
            sqs_client.receive_message(QueueUrl=dl_queue_url)["Messages"][0]["MessageId"]
            == result_send["MessageId"]
        )
    def test_dead_letter_queue_chain(self, sqs_client, sqs_create_queue):
        # te
        # cr
        queue_names = [f"q-{short_uid()}", f"q-{short_uid()}", f"q-{short_uid()}"]
        for queue_name in queue_names:
            sqs_create_queue(QueueName=queue_name, Attributes={"VisibilityTimeout": "0"})
        queue_urls = [aws_stack.get_sqs_queue_url(queue_name) for queue_name in queue_names]
        # se
        for idx, queue_name in enumerate(queue_names[:2]):
            policy = {
                "deadLetterTargetArn": aws_stack.sqs_queue_arn(queue_names[idx + 1]),
                "maxReceiveCount": 1,
            }
            sqs_client.set_queue_attributes(
                QueueUrl=queue_urls[idx],
                Attributes={"RedrivePolicy": json.dumps(policy), "VisibilityTimeout": "0"},
            )
        def _retry_receive(q_url):