Implements kzg tests

[EchoAlice]

Begins to fix #352

[ralexstokes]

looks great! I'd follow the structure of the bls tests for how to move forward

[ralexstokes]

amazing! left some comments

[ralexstokes]

p sure we can just do this to simplify the code a bit

Suggested change

	let kzg_commitment = blob_to_kzg_commitment(&blob, &kzg_settings).unwrap();
	let kzg_commitment = blob_to_kzg_commitment(&blob, &kzg_settings)?;

[ralexstokes]

updates look good!

I would consider at this point moving each block of code in each handler to its own function so this doesn't become one huge function inside dispatch

so it would look something like

match meta.handler.0.as_str() {
  "blob_to_kzg_committment" => run_blob_to_kzg_committment_test(test, &kzg_settings),
  "compute_kzg_proof" => run_compute_kzg_proof_test(test, &kzg_settings),
   // etc...

where each "run_*_test" fn would be something like

fn run_*_test(test: &TestCase, kzg_settings: &KzgSettings) -> Result<(), Error> {
  // specific logic in here
}

[ralexstokes]

looks great! left a few comments from a quick skim, getting there!!

[ralexstokes]

looks great! we did compute some values an additional time when we don't need to