Add Fulu boilerplate (#6695)

* Add Fulu boilerplate

* Add more boilerplate

* Change fulu_time to osaka_time

* Merge branch 'unstable' into fulu-boilerplate

* Fix tests

* Merge branch 'unstable' into fulu-boilerplate

* More test fixes

* Apply suggestions

* Remove `get_payload` boilerplate

* Add lightclient fulu types and fix beacon-chain-tests

* Disable Fulu in ef-tests

* Reduce boilerplate for future forks

* Small fixes

* One more fix

* Apply suggestions

* Merge branch 'unstable' into fulu-boilerplate

* Fix lints

consensus/state_processing/src/per_block_processing/signature_sets.rs

@@ -387,22 +387,20 @@ where
     let exit = &signed_exit.message;
     let proposer_index = exit.validator_index as usize;
 
-    let domain = match state {
-        BeaconState::Base(_)
-        | BeaconState::Altair(_)
-        | BeaconState::Bellatrix(_)
-        | BeaconState::Capella(_) => spec.get_domain(
+    let domain = if state.fork_name_unchecked().deneb_enabled() {
+        // EIP-7044
+        spec.compute_domain(
+            Domain::VoluntaryExit,
+            spec.capella_fork_version,
+            state.genesis_validators_root(),
+        )
+    } else {
+        spec.get_domain(
             exit.epoch,
             Domain::VoluntaryExit,
             &state.fork(),
             state.genesis_validators_root(),
-        ),
-        // EIP-7044
-        BeaconState::Deneb(_) | BeaconState::Electra(_) => spec.compute_domain(
-            Domain::VoluntaryExit,
-            spec.capella_fork_version,
-            state.genesis_validators_root(),
-        ),
+        )
     };
 
     let message = exit.signing_root(domain);