[TD] Remove credentials requirement for retrieval (#122279)
Made the bucket readable by public
https://s3.console.aws.amazon.com/s3/buckets/target-determinator-assets?region=us-east-1&bucketType=general&tab=permissions
The only jobs that matter here are the retrieval and td jobs, which were both successful
Pull Request resolved: https://github.com/pytorch/pytorch/pull/122279
Approved by: https://github.com/huydhn
