technical debt: re-evaluate block skips in unit tests.

[dogversioning]

This pattern has gotten bigger and has started to show up in more places in unit tests:

            assert (
                item["Key"].startswith(BucketPath.LAST_VALID.value)
                or item["Key"].startswith(BucketPath.ARCHIVE.value)
                or item["Key"].startswith(BucketPath.ERROR.value)
                or item["Key"].startswith(BucketPath.ADMIN.value)
                or item["Key"].endswith("study_periods.json")
            )

This should be re-evaluated - this is :mostly: due to the shared S3 mock and isn't delivering a lot of value.