feat: Adds support for Placeholders in TrainingStep to set S3 location for InputDataConfig and OutputDataConfig#142

shivlaks merged 14 commits intoaws:mainaws/aws-step-functions-data-science-sdk-python:mainfrom

ca-nguyen:training-step-with-dynamic-output-pathca-nguyen/aws-step-functions-data-science-sdk-python:training-step-with-dynamic-output-pathCopy head branch name to clipboard