feat: poseidon2 for koala-bear, baby-bear and goldilocks

[yelhousni]

Description

This PR adds support of poseidon2 hash on small fields: baby-bear, koala-bear and goldilocks.

Type of change

• New feature (non-breaking change which adds functionality)

How has this been tested?

How has this been benchmarked?

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I did not modify files generated from templates
• golangci-lint does not output errors locally
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[Tabaie]

All lgtm except for the Merkle-Damgard stuff, which I think we should take out until we generify it to support widths other than 2.

Also, I'm not familiar with how the matrices are computed so I didn't verify those.