### 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 = sqs_client.receive_message(QueueUrl=queue_event_source_mapping)
                msg = result["Messages"][0]
                body = json.loads(msg["Body"])
                assert body["requestContext"]["condition"] == "RetryAttemptsExhausted"
                assert body["KinesisBatchInfo"]["batchSize"] == 1
                assert body["KinesisBatchInfo"]["streamArn"] == kinesis_arn
            retry(verify_failure_received, retries=50, sleep=5, sleep_before=5)
        finally:
            kinesis_client.delete_stream(StreamName=kinesis_name, EnforceConsumerDeletion=True)
            lambda_client.delete_event_source_mapping(UUID=event_source_mapping_uuid)
def _await_event_source_mapping_enabled(lambda_client, uuid, retries=30):
    def assert_mapping_enabled():
        assert lambda_client.get_event_source_mapping(UUID=uuid)["State"] == "Enabled"
    retry(assert_mapping_enabled, sleep_before=2, retries=retries)
def _await_dynamodb_table_active(dynamodb_client, table_name, retries=6):
    def assert_table_active():
        assert (
            dynamodb_client.describe_table(TableName=table_name)["Table"]["TableStatus"] == "ACTIVE"
        )
    retry(assert_table_active, retries=retries, sleep_before=2)
def _get_lambda_invocation_events(logs_client, function_name, expected_num_events, retries=30):
    def get_events():
        events = get_lambda_log_events(function_name, logs_client=logs_client)
        assert len(events) == expected_num_events
        return events
    return retry(get_events, retries=retries, sleep_before=2)