[Bug]: DataBucket name need to be unique. flotorch-data-(TableSuffix) results in duplicate Bucket names and stack failure

[balualways]

FloTorch Version

v3.0.1

Bug Description

S3 Bucket names need to be unique - https://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html

https://github.com/FissionAI/FloTorch/blob/main/cfn/dynamodb-template.yaml#L163 - results in Stack failure as the tablename is not unique

Steps to Reproduce

Deploy existing stack with provision.sh- will result in failed stack - dynamodb-stackset - DynamoDB Tables Template for FloTorch

Browser and Version

No response

Runtime Version

No response

Error Messages

DynamoDB Stackset failed at the DataBucket Stage

Reason: S3 bucket name needs to be unique

Additional Context

No response

[balualways]

### Open PR: #364