[WIP] eip2539 public interface

[prestwich]

Largely a find+replace port of the existing eip2537 public interface.

This branch includes changes to the B coefficient constants to match the zexe implementation

Outstanding issue:

• 3 tests are flaky.
  • public_interface::eip2539::test::dump_vectors_into_fuzzing_corpus
    • a csv issue
  • public_interface::eip2539::test::run_g1_add_on_vector
    • a csv issue
    • passes when running the test in isolation or running on --test-threads 1
  • public_interface::eip2539::test::generate_negative_test_pairing_invalid_subgroup
    • gives NotInField errors when making random Fp

[prestwich]

Was drafting a comment and accidentally closed instead 🙄

Although most of the functionality is working, I haven't made any progress on the tests. I have draft integration branches with OE and Nethermind, but I'm reluctant to push them without passing tests. Any points on the above?