Expand field tests with BabyBear, KoalaBear and Goldilocks #573
Description
The small fields' primes were added in:
- BabyBear: Nvidia target via NVRTC and Nim ↦ CUDA DSL #487
- KoalaBear: add: koalabear prime field #571
- Goldilocks: add Goldilocks field #567
But they do not have any test at the moment and there can also be optimized by #11.
Hence prior to Crandall prime acceleration (#445) applied to them, we need more tests to ensure non-regression.