feat: add fork choice endpoint to api spec tests#439

tcoratger merged 1 commit intoleanEthereum:mainleanEthereum/leanSpec:mainfrom

shariqnaiyer:feature/shariqnaiyer/fork-choice-spec-testshariqnaiyer/leanSpec:feature/shariqnaiyer/fork-choice-spec-testCopy head branch name to clipboard