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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


raise_error = None
    if sleep_before > 0:
        time.sleep(sleep_before)
    for i in range(0, retries + 1):
        try:
            return function(**kwargs)
        except Exception as error:
            raise_error = error
            time.sleep(sleep)
    raise raise_error
def dump_thread_info():
    for t in threading.enumerate():
        print(t)
    print(run("ps aux | grep 'node\\|java\\|python'"))
def merge_recursive(source, destination, none_values=[None]):
    for key, value in source.items():
        if isinstance(value, dict):
            
            node = destination.setdefault(key, {})
            merge_recursive(value, node)
        else:
            if not isinstance(destination, dict):
                LOG.warning('Destination for merging %s=%s is not dict: %s' %
                    (key, value, destination))
            if destination.get(key) in none_values:
                destination[key] = value
    return destination
def merge_dicts(*dicts, **kwargs):