Tests are failing

Hello, thanks for the implementation.

However, few tests are failing after #3 merged.

I am running the tests on m1 mac and can confirm tests pass till #2.

Test summary:
```
//hintless_simplepir:client_test PASSED in 1.0s
//hintless_simplepir:database_benchmarks PASSED in 0.8s
//hintless_simplepir:database_hwy_benchmarks PASSED in 1.3s
//hintless_simplepir:database_hwy_test PASSED in 2.2s
//hintless_simplepir:database_test PASSED in 2.5s
//hintless_simplepir:hintless_simplepir_benchmarks PASSED in 0.9s
//hintless_simplepir:server_test PASSED in 10.6s
//hintless_simplepir:simplepir_test PASSED in 0.7s
//hintless_simplepir:utils_test PASSED in 1.9s
//linpir:client_test PASSED in 2.3s
//linpir:linpir_benchmarks PASSED in 1.8s
//lwe:lwe_symmetric_encryption_test PASSED in 0.8s
//lwe:sample_error_test PASSED in 0.6s
//hintless_simplepir:hintless_simplepir_test FAILED in 288.1s
//linpir:database_test FAILED in 123.6s
//linpir:linpir_test FAILED in 62.4s
//linpir:server_test FAILED in 137.2s
```