Add tests for all test vectors in DKG

[azuchi]

The current DKG test vector is only tested on participant 1's data. This PR applies the same tests to the data from participants 2 and 3.

Accordingly, the following modifications were made to the existing Test Vector:

frost-ed448

Fix incorrect share generated from polynomials.

frost-ed25519

Fix incorrect shares generated in roud2, step3.

frost-secp256k1-tr

• Fix incorrect proof_of_knowledge for participant 1.
• Add missing data for participants 2 and 3.

If I have misunderstood these test vector modifications, please let me know.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.88%. Comparing base (5f4ac6e) to head (1e5069a).
Report is 103 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #875      +/-   ##
==========================================
+ Coverage   82.18%   82.88%   +0.69%     
==========================================
  Files          31       41      +10     
  Lines        3188     4387    +1199     
==========================================
+ Hits         2620     3636    +1016     
- Misses        568      751     +183     

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