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# Type of request: This is a ...

[ ] bug report
[X ] feature request

# Detailed description

I'm using localstack to create a dynamoDb table locally with a dynamodb stream and a flink application consuming data from the stream
The shardId created in localstack follows this format

shardId-000000000000-798cedd84a2953c5af70a131f8701f35

Flink expects this format
shardId-00000001592367572726-07776efd

The difference is just after the prefix shardId.
Normally the real shardId created by amazon use is composed by shardId prefix, 20-digit timestamp and 0-36 or more characters separated by '-'

The current shardId format is not valid for flink applications and it's not following the real pattern used by amazon

## Expected behavior

ShardId must follow the pattern
shardId prefix, 20-digit timestamp and 0-36 or more characters separated by '-'

## Actual behavior

The shardId follows the pattern
shardId prefix, 12 0s and 33 characters separated by '-'

# Steps to reproduce

Create a dynamodb table

## Command used to start LocalStack

I'm using docker and docker compose to run localstack


## Client code (AWS SDK code snippet, or sequence of "awslocal" commands)

aws --endpoint-url=http://localhost:4566 dynamodb create-table \
    --table-name temp4 \
    --attribute-definitions AttributeName=partition_key,AttributeType=S AttributeName=sort_key,AttributeType=S \
    --key-schema AttributeName=partition_key,KeyType=HASH AttributeName=sort_key,KeyType=RANGE \
    --provisioned-throughput ReadCapacityUnits=100,WriteCapacityUnits=100 \
    --stream-specification StreamEnabled=true,StreamViewType=NEW_AND_OLD_IMAGES


client = self.client
        response = client.create_queue(QueueName='test-queue')
        queue_url = response['QueueUrl']
        try:
            client.send_message_batch(QueueUrl=queue_url, Entries=[])
        except ClientError as e:
            self.assertEqual(e.response['Error']['Code'], 'EmptyBatchRequest')
            self.assertEqual(e.response['ResponseMetadata']['HTTPStatusCode'], 404)
        entries = [{
            'Id': 'message{:02d}'.format(0),
            'MessageBody': 'msgBody{:02d}'.format(0),
            'MessageAttributes': {
                'CustomAttribute': {
                    'DataType': 'String',
                    'StringValue': 'CustomAttributeValue{:02d}'.format(0)
                }
            }
        }]
        result = client.send_message_batch(QueueUrl=queue_url, Entries=entries)
        self.assertEqual(result['ResponseMetadata']['HTTPStatusCode'], 200)
        
        client.delete_queue(QueueUrl=queue_url)