test: skip error checks when cleaning up (#197)
test: skip error checks when cleaning up (#197)

Skip error checks when cleaning up because some tests delete entries as part of the tests.
Also add t.Helper() to helper functions.

Co-authored-by: Alex Hong <a9ccb06cbb47e15d85bcb2cc9161076d89dbbe0a@users.noreply.github.com>
googleforgames/open-saves,googleforgames/open-saves