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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


if enabled:
        
        stream_name = get_kinesis_stream_name(table_name)
        aws_stack.create_kinesis_stream(stream_name)
        latest_stream_label = latest_stream_label or 'latest'
        stream = {
            'StreamArn': aws_stack.dynamodb_stream_arn(
                table_name=table_name, latest_stream_label=latest_stream_label),
            'TableName': table_name,
            'StreamLabel': latest_stream_label,
            'StreamStatus': 'ENABLED',
            'KeySchema': [],
            'Shards': []
        }
        table_arn = aws_stack.dynamodb_table_arn(table_name)
        DDB_STREAMS[table_arn] = stream
        
        event_publisher.fire_event(event_publisher.EVENT_DYNAMODB_CREATE_STREAM,
            payload={'n': event_publisher.get_hash(table_name)})
def forward_events(records):