Require --instance-type when specifying accelerator resources (#317)#393

mollyheamazon merged 2 commits intoaws:mainaws/sagemaker-hyperpod-cli:mainfrom

FarhanTejani:fix/accelerators-require-instance-typeFarhanTejani/sagemaker-hyperpod-cli:fix/accelerators-require-instance-typeCopy head branch name to clipboard