1.1.5 merge spec tests (#2781)

* Fix arbitrary check kintsugi

* Add merge chain spec fields, and a function to determine which constant to use based on the state variant

* increment spec test version

* Remove `Transaction` enum wrapper

* Remove Transaction new-type

* Remove gas validations

* Add `--terminal-block-hash-epoch-override` flag

* Increment spec tests version to 1.1.5

* Remove extraneous gossip verification https://github.com/ethereum/consensus-specs/pull/2687

* - Remove unused Error variants
- Require both "terminal-block-hash-epoch-override" and "terminal-block-hash-override" when either flag is used

* - Remove a couple more unused Error variants

Co-authored-by: Paul Hauner <paul@paulhauner.com>

testing/ef_tests/src/cases/epoch_processing.rs

@@ -138,7 +138,6 @@ impl<E: EthSpec> EpochTransition<E> for Slashings {
                 process_slashings(
                     state,
                     validator_statuses.total_balances.current_epoch(),
-                    spec.proportional_slashing_multiplier,
                     spec,
                 )?;
             }
@@ -148,7 +147,6 @@ impl<E: EthSpec> EpochTransition<E> for Slashings {
                     altair::ParticipationCache::new(state, spec)
                         .unwrap()
                         .current_epoch_total_active_balance(),
-                    spec.proportional_slashing_multiplier_altair,
                     spec,
                 )?;
             }