Beefy equivocation: add runtime API methods (#4993)
Related to https://github.com/paritytech/polkadot-sdk/issues/4523 Add runtime API methods for: - generating the ancestry proof - submiting a fork voting report - submitting a future voting report
Related to https://github.com/paritytech/polkadot-sdk/issues/4523 Add runtime API methods for: - generating the ancestry proof - submiting a fork voting report - submitting a future voting report